Natural selection and biological evolution are processes that depend on genetic variation. Natural selection does not take place, but genetic variations that develop in a population do.
DNA mutation, gene flow (the movement of genes from one population to another), and sexual reproduction are the main causes of genetic variation. Because environments are unstable, populations with genetic diversity will be better able to adapt to shifting conditions than populations without genetic diversity.Natural selection and biological evolution are processes that depend on genetic variety. Natural selection does not take place, but genetic variants that develop in a population do. Genetic variations in a population interact with the environment to produce natural selection. Which genetic variations are more advantageous or better adapted for survival depends on the environment. More advantageous traits are transmitted to the population as a whole as organisms with these environmentally selected genes live and reproduce.To know more about Genetic check the below link:
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enzymes degrade proteins, lipids, and large carbohydrates to smaller building blocks in the digestive tract. why must these macromolecules be broken down? which smaller building blocks can be absorbed?
Amino acids, which serve as the "building blocks" of proteins, are disassembled. These tiny molecules can be absorbed through the stomach wall after being released.
Describe how the macronutrients in your diet are digested and then put back together to form the cell structure.The principal macromolecules, from which all life is derived, are macrounits in our diet. The smaller subunits of these macromolecules must be broken down in order to be released. The circulatory system carries the digestively released components to the body's cells. These subunits serve as the building blocks for the macromolecules required for cellular structure and function, which are then put together by cells.
Proteins, lipids, and carbohydrates are examples of macromolecules.
The fact that all three macromolecules are hydrocarbons means that the majority of their atoms are made up of hydrogen and carbon.
Nitrogen atoms are found in proteins and in lipids.
Carbon atoms make up carbohydrates.
Simple carbohydrates are formed when complex carbohydrates are hydrated (by adding hydrogen and oxygen ions).
Dehydration of simple carbohydrates causes them to bind together in chains to create complex carbs. This can be reversed.
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Explain how this experiment models a cell membrane. Use the following terms in your explanation: selectively permeable, hypertonic, diffusion, indicator.
The cell membrane is considered the outer boundary of the cell and is selectively permeable, allowing diffusion of gases such as oxygen and carbon dioxide, water and micronutrients.
How can cell membranes ensure a certain permeability?Cell membranes are said to be selectively permeable because only certain molecules can pass through them. Only certain types of molecules, such as water and gas molecules, can pass directly through cell membranes.
Model membrane system:
The properties of lipids in membranes have been demonstrated in detail using a membrane model system. Multilamellar liposomes are one of the most commonly used model membrane systems.
See below for more information on cell membranes.
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What are the 3 most important things about storage areas?.
Storage areas fall into three categories: mechanized warehouses, manual warehouses, and storerooms.
Garage centers are very beneficial when you want to preserve gadgets in a scientific way. So, manipulate your garage unit and make it prepared. The business enterprise and making plans are very crucial factors when you have a business, too. a terrific and reliable garage facility is needed for retaining vital documents or goods.
A garage area community (SAN) is a devoted, impartial excessive-velocity network that interconnects and offers shared swimming pools of storage devices to multiple servers. every server can get entry to the shared garage as if it were a drive immediately connected to the server.
Not unusual storage regions (CSA) are used by VTAM® and other sources in your network to hold buffers and manage blocks inside the CSA for MVS™ structures. For overall performance motives, VTAM offers you a few manage over its use of commonplace storage regions with the begin options. these alternatives are described in the following sections.
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Which of the following is NOT a product of the citric acid cycle?
NAD
FADH2
ATP
CO2
NAD
The Citric acid cycle results in the production of carbon dioxide, NADH, FADH2, and GTP (which is comparable to ATP). Throughout this cycle, no water is produced.
What results from the citric acid cycle?Each cycle's turn results in the production of three NADH molecules and one FADH2 molecule. In order to produce ATP molecules, these carriers will be involved in the final phase of aerobic respiration. Each cycle additionally yields one GTP or A.
Of these, which is not a byproduct of the citric acid cycle?The Citric acid cycle results in the production of carbon dioxide, NADH, FADH2, and GTP (which is comparable to ATP). Throughout this cycle, no water is produced. Consequently, 3. water is the right response.
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Aume that a 100 bae pair DNA double helix contain 15 cytoine'. How many adenine are there?
In the DNA double helix, which has 100 base pairs and 85 adenines, there are 15 cytosines.
A DNA double helix contains 100 base pair thus total 200 nucleotide base pair out of that 15 base pair is of cytosine. In a DNA cytosine is equal to guanine thus, guanine nucleotide will be 15 total 30 nucelotide base
Now, 200 - 30= 170 base pair is of adenine and thymine. The adenine and thymine are equal thus , 170/2 = 85 base nucleotide of adenine and thymine.
DNA nucleotides:The DNA molecule is made up of two bases (or nucleotides) that contain nitrogen. Adenine (A), cytosine (C), guanine (G), and thymine (T) are the four bases of DNA (T). These bases come in particular pairs (A with T, and G with C).For more information on nucleotides kindly visit to
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The red fire ant is indigenous to south america. In recent years, this invasive species has become a pest for both humans and other ants in the southeastern united states due to their resource consumption and crop destruction. What would be the safest way to reduce the impact of the non-native red fire ant while minimizing the impact on other organisms?.
Pseudacteon tricuspis and Pseudacteon curvatus are effective biological tools in controlling the populations of these invasive red fire ants.
What is meant by Pseudacteon tricuspis and Pseudacteon curvatus ?
The family Phoridae, often known as scuttle flies, hump-backed flies, and phorid flies, includes insects of the genus Pseudacteon (Disney 1994). The genus Solenopsis, which includes the invasive red (Solenopsis invicta Buren) and black imported fire ants, is parasitized by phorid flies in the genus Pseudacteon (Solenopsis richteri Forel). The first Pseudacteon fly species to be successfully distributed in the United States as a biological control agent for imported fire ants was Pseudacteon tricuspis Borgmeier in 1997.Since then, five other species have been introduced: Pseudacteon curvatus Borgmeier, Pseudacteon litoralis Borgmeier, Pseudacteon obtusus Borgmeier, Pseudacteon nocens Borgmeier, and Pseudacteon cultellatus Borgmeier (Porter and Calcaterra 2013).Learn more about Red fire ant refer to : https://brainly.com/question/9739091
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Staphylococcus aureus produces ________, an enzyme that results in the accumulation of fibrin around the bacterial cells, and the test for it helps to diagnose it.
Coagulation testing aids in the diagnosis of Staphylococcus aureus because it generates coagulase, an enzyme that causes a buildup of fibrin surrounding the bacterial cells.
Coagulases are polypeptides secreted by clinical isolates of Staphylococcus aureus that bind to and activate prothrombin, converting fibrinogen to fibrin and facilitating blood or plasma coagulation.Species of staphylococci are known as coagulase-negative staphylococci because they do not. On the skin of every healthy person, these microorganisms are typically present.
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The partial twinning that led to the births of conjoined twins Abby and Brittany Hensel must have happened during the first two weeks of gestation, because the girls
A. have two heads.
B. share tissues that descend from ectoderm, endoderm, and mesoderm.
C. share only tissues derived from mesoderm.
D. were born on time.
E. have two separate nervous systems.
B
Given that the conjoined twins Abby and Brittany Hensel share tissues descended from ectoderm, endoderm, and mesoderm, the partial twinning that resulted in their birth must have occurred during the first two weeks of pregnancy. (option-b).
What is ectoderm, endoderm, and mesoderm?The nervous system and skin are derived from the ectoderm. Numerous cell types, including bone, muscle, and connective tissue, are developed according to mesoderm specifications. The linings of the respiratory and digestive systems, as well as organs like the liver and pancreas, are formed by endoderm layer cells.
The body's nervous system and epidermal skin cells are produced by the ectoderm, muscle cells and connective tissue are produced by the mesoderm, and the digestive system and other internal organs are produced by the endoderm.
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Diagram the entire anatomical pathway of the reaction response starting from the stimulus at the contralateral hammer strike all the way to the response at the ipsilateral limb. Include names of muscles involved, tracts involved, and brain regions involved.
A reflex is an uncontrollable movement that happens almost instantly in response to a stimuli. Before an impulse reaches the brain, reflex arcs respond to it.
The reflex, which happens through a reflex arc, is an automatic reaction to a stimuli that doesn't require or receive conscious cognition. examines descending motor pathways, motor nerves, synaptic connections in the spinal cord, and afferent nerves. Reflexes are suppressed by lower motor neuron lesions (such as those that damage the anterior horn cell, spinal root, or peripheral nerve) and are increased by upper motor neuron lesions. The target muscle group needs to be in a neutral position (i.e. neither stretched nor contracted).
It is important to identify the tendon that connects the muscle(s) being evaluated.
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Microscope differential count Complete the following steps: Focus slide at 4x using the coarse focus, then the fine focus MICROSCOPE CONTROLS Rotate 40X nosepiece Coarse focus Fine focus SLIDE POSITION -1227 Turn objective to 10x and focus again al- Stage horizontal Stage vertical 1 1 Turn objective to 40X and focus again METHODS Lab Data - X LABELS Move to upper-left corner of slide Count Percentage Neutrophils . + 33.3 5 + 1 33.3 Lymphocytes Monocytes Open Lab Data. Count each type of WBC in each region of slide by clicking corresponding buttons in Lab Data. + 0 0.0 Eosinophils + 0 0.0 Basophils - + 1 33.3 6 Total 3 100 Count 50 WBCs in total by using arrow buttons to move through regions of slide. How to Identify WBCS
In this case, a total of 50 WBC must be counted, so the findings are:
Neutrophils → 32 (64%)Lymphocytes → 13 (26%)Monocytes → 3 (6%)Acidophils → 2 (4%)Basophil → 0 (0%)This question is about differential leukocyte practicum, we have to look for the type and number of leukocytes found on the prepared slide. (For complete questions, see the picture)
White blood cells have a nucleus so they are blue, there are 5 white blood cells namely:
Lymphocytes have a large nucleus that almost fills the cell with a thin rim of cytoplasm around it.Basophils have a bilobed nucleus and are finely granular and therefore have a pale stain in the cytoplasm.Neutrophils have a segmented nucleus with granules in the cytoplasm and are the size compared to others.Monocytes have a kidney-shaped nucleus with an invaginated vacuole and thin cytoplasm at the periphery and are relatively in sizeEosinophils have a bilobed nucleus with large eosinophilic granulesAfter knowing the characteristics of the types of white blood cells, we can identify white blood cells in a given area.
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What is the order of genetic information from largest to smallest?.
The correct order of genetic information from largest to smallest is Genome, Chromosome, Gene, and Nucleotide.
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during a fear conditioning experiment a light flash is paired with a shock, one animal freezes in place when seeing the light flash alone while a second animal does not. you were told the second animal had a brain lesion and assumed the lesion to be in the .
The second animal had a brain injury and thought it was in the amygdala.
What is the test for conditioning fear?One of the most frequently employed paradigms to measure memory and learning is the contextual and cued fear conditioning test. A context or conditioned stimulus (here, an auditory cue) is linked to an unpleasant stimulus in this test, which is a type of Pavlovian conditioning (electric footshock).
Examples of Conditioning Fear
In typical fear conditioning studies, the aversive stimulus is not presented to the rat or rodent in the cage at home. The animal is then placed in a new environment, exposed to unpleasant stimuli, such as a slight electrical shock to the foot, and then taken away.
Animals are put in a novel conditioning cage where they hear an auditory tone and then experience a brief foot shock in the most widely used version of the fear-conditioning paradigm. The animal can therefore connect the tone and new context with the unpleasant stimulus.
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If a mutation has a visible effect at 26°c, but no visible effect at 20°c, then 20°c is the _______ temperature and 26°c is the _______ temperature.
If a mutation has a visible effect at 26°c, but no visible effect at 20°c, then 20°c is the permissive temperature and 26°c is the restrictive temperature.
The majority of temperature-sensitive mutations damage proteins and result in loss of protein function when temperatures are too high. The permissive temperature is that at which the protein can usually fold correctly or continue to fold correctly. The protein becomes unstable and loses its ability to function at higher temperatures. In diploid organisms, these mutations are frequently recessive. Changing the growth temperature is a simple way to diminish specific gene products in temperature sensitive mutants, which have a reversible mechanismand can do so at different phases of growth.
A temperature-sensitive mutant gene product's permissive temperature is the point at which it develops a typical, useful phenotype. Even when a mutant allele is present, when a temperature-sensitive mutant is grown in a permissive environment, the mutated gene product operates normally (i.e., the phenotype is not shown). As if it were a wild type strain, the cell or organism survives as a result of this. The temperature at which the mutant phenotype is seen, in contrast, is the nonpermissive temperature or restrictive temperature.
Missense mutations are frequently temperature-sensitive mutations because they carry the function of a specific required gene at the typical, permissive low temperature. At a rather high, inadmissible temperature, it will instead not perform the function and show a Middle, semi-permissive temperature and hypomorphic (partial loss of gene activity).
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The three factors that regulate glycolysis include all of the following except: A)Concentrations of key glycolytic enzymes; B)Carbon dioxide; C)Oxygen; D)Levels of fructose 1,6-disphosphate
It is the procedure through which a glucose molecule is split into two pyruvate molecules. Animal and plant cells' cytoplasm's are where the process occurs.
The process involves six enzymes. Two pyruvate, two ATP, and two molecules of NADH are the reaction's final byproducts.
Regulation of Glycolysis It's a general principle of metabolic control that pathways are controlled at the committed step. The committed phase is the one when there is just one possible outcome for the substrate. The regulation of glycolysis takes place at various points because glycolytic intermediates are a source of energy for numerous different routes.
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Describe the significant events of glycolysis. Include which reactants and products (if any) are involved. Highlight what will be released as a product and what will move on to the next stage. Be sure to include where the process occurs in the Mitochondria.
Glycolysis is the first stage in cellular respiration where glucose is broken down. It splits glucose (6 C molecule) in half into 2 pyruvate (3 C molecules). Produces ATP and pyruvate. Occurs in the Cytoplasm.
During the first phase of cellular respiration, glucose is metabolised. It divides six-carbon glucose into two pyruvate molecules (3 C molecules). generates pyruvate and ATP. finds a home in the cytoplasm.
What constituents and byproducts of glycolysis are there? How does it happen?During the first phase of cellular respiration, glucose is metabolised. It divides six-carbon glucose into two pyruvate molecules (3 C molecules). generates pyruvate and ATP. finds a home in the cytoplasm.
A six-carbon glucose molecule is partially broken down during glycolysis into two, three-carbon pyruvate molecules, 2NADH + 2H+, and 2 net ATP molecules as a result of substrate-level phosphorylation. In the cell's cytoplasm, glycolysis takes place.
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Which cranial nerve is in charge of the motor control of the muscles that move the tongue?.
Answer:
Hypoglossal nerve
Explanation:
The hypoglossal nerve controls muscles that move the tongue,
d types each of us has an abo blood type, which describes whether two characteristics called a and b are present. every human being has two blood type alleles (gene forms), one inherited from our mother and o
Probability of having alleles A and A i.e. Blood type A = 0.5×0.5 = 0.25
Probability of having alleles A and B, i.e Blood type AB = 0.25 × 2 = 0.5
Probability of having alleles B and B , i.e Blood type B= 0.5 × 0.5 = 0.25
Probability that both their children have same blood type = 0.25^2 + 0.5^2 + 0.25^2 = 0.375
Alleles are any of two or more genes that may alternately appear at a certain location (locus) on a chromosome. They are also known as allelomorphs. The expression (phenotype) of a specific characteristic can be influenced by a single allele, a pair of alleles, or several alleles.
A unique bodily fluid is blood. Red blood cells, white blood cells, platelets, and plasma make up its four basic parts. Transporting nutrients and oxygen to the tissues and the lungs is only one of the numerous jobs blood does. causing blood to clot in order to stop excessive blood loss.
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which of the following is not considered biomass? group of answer choices charcoal animal manure coal crop residues wood
c) Coal is not considered biomass.
In the field of science, biomass can be described as such kind of fuel that is obtained from living organisms such as plants and animals. When the dead plants and animals are burned, fuel is produced which is biomass.
Coal is a resource that does not come from living organisms. Coal is a natural resource that is present in the earth in the form of coal rocks. Although coal is also an excellent fuel used for many purposes, it is not biomass because it is not obtained from the burning of living organisms.
The energy obtained from coal as well as biomass is considered to be a non-renewable resource because it cannot be recycled.
The question will correctly be written as:
which of the following is not considered biomass? group of answer choices
a) charcoal
b) animal manure
c) coal
d)crop residues
e) wood
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The maximum number of organisms of a particular species that can be supported by an environment is called.
Carrying capacity.
This will often be marked by a plateau in a graph of a species' population.
What are the 7 properties that all living things share?.
Order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing are all shared by all living organisms.
A one-of-a-kind ability to reproduce, grow, metabolize, respond to stimuli, adapt to the environment, move, and, finally, breathe.
Living things can grow and change. Energy is obtained and used by living beings. They adjust to their surroundings. Every living thing is made up of one or more cells. Living things react to their surroundings or stimuli. All living things excrete waste material from their bodies.
Growth, reproduction, the ability to sense the environment, and appropriate response to something are all considered distinct characteristics of living organisms. Some characteristics that can be added to the list include metabolism, the ability to self-replicate, self-organized interaction, and emergence.
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what is the major advantage of selective serotonin reuptake inhibitors (ssris) over other types of antidepressant therapy?
Because they typically have fewer side effects than most other types of antidepressants.
By raising serotonin levels in the brain, SSRIs alleviate depression. One of the chemical messengers, or neurotransmitters, that communicate between brain nerve cells is serotonin (neurons).
Serotonin reabsorption (reuptake) into neurons is inhibited by SSRIs. As a result, there is more serotonin accessible, which enhances neural communication. Because they primarily impact serotonin and not other neurotransmitters, SSRIs are referred to as selective. In addition to treating depression, SSRIs can also be used to treat anxiety disorders.
Hence, SSRIs are typically the first choice medication for depression.
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TRUE/FALSE. transmission is a type of vertical transmission of disease that occurs when parasites are acquired during one life stage and passed on to the next life stage of an insect.
Transmission is a type of vertical transmission of disease that occurs when parasites are acquired during one life stage and passed on to the next life stage of an insect. This is a true statement.
Vertical transmission refers to the transmission of the virus from parent to child across generations. HIV-1 is, for example, B. intrauterine (by disruption of the placental barrier or transcytosis of cell-associated viruses), intrapartum (intrapartum) or during lactation.
Transmission routes include direct contact, droplets, vectors such as mosquitoes, vehicles such as food, or the respiratory tract. Vulnerable hosts have multiple entry points, such as mouths and syringes.
Vertical transmission is an indirect, vector-mediated biological transmission process in which the pathogen infects the offspring from the female parent via the egg. Only the ovarian sheath and fallopian tubes are infected. Eggs become infected when they pass through the fallopian tubes and are inseminated.
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the brains of people who suffer from depression tend to have low levels of: epigenetic marks. glucose. serotonin. molecular genetic tags.
The brains of people who suffer from depression tend to have low levels of serotonin.
Why is serotonin responsible for depression?Depression is а common аnd serious medicаl illness thаt negаtively аffects how we feel, the wаy we think аnd how we аct. The mаin cаndidаte genes аnаlysed in relаtion to trаumаtic stress аre those with the instructions to produce the glucocorticoid receptor аnd the serotonin trаnsporter. The glucocorticoid receptor binds steroid hormones, mаinly cortisol, аnd is involved in responses to stress аnd, in mice, in the regulаtion of аnxiety, аggression аnd cognitive performаnce. The serotonin trаnsporter is involved in the function of serotonin, а neurotrаnsmitter, which hаs been relаted to depressive disorders.
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What are the 3 concepts about mutation?.
There are three types of DNA Mutations: base substitutions, deletions, and insertions.
A mutation is, at its most basic, a change or transformation. Chromosome and gene changes, known as mutations in biology, frequently manifest physically. DNA copying errors that occur during cell division, ionizing radiation exposure, contact with substances known as mutagens, and viral infection can all cause mutations. Base-pair substitutions, often known as modifications to single base pairs, are the most basic type. Some mutant genes also exhibit more intricate arrangements of nucleotide substitutions, insertions, and deletions.
Mutation describes an abrupt shift in a gene's characteristics. DNA changes are referred to as mutations. A gene's genetic message is changed by a mutation. It causes the emergence of fresh traits that can be passed down.
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why does it make sense that metabolism of pyruvate to acetyl-coa would be inhibited by fatty acids? speculate why the production of metabolic acids
Because the inhibitory products of the pyruvate dehydrogenase reaction , that is NADH and acetyl -coA are also produces during beta-oxidation of fatty acids .
which resulted in conversion of active pyruvate dehydrogenase into it's inactive form .
The metabolism of pyruvate is affected by ATP/ADP , NADH/NAD+ and acetyl-CoA/CoA ratios .
Hence , that is the reason for inhibition of pyruvate to acetyl-coa .
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Which of the following is not a point mutation?.
The right answer is (A) deletion.
Point mutations are defined as changes to a single nucleotide base inside a DNA segment. Deletion is the process of removing one or more nucleotide bases from a DNA segment. Point mutation results from single nucleotide deletion. An inverted chromosome is one that has had a portion of its ends switched around. A relatively big chromosome is disrupted by inversion, which also causes chromosomal abnormalities but not point mutations.
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heritability is one key criterion for natural selection, but for memes to evolve and adapt what factor is necessary to be in the population? and in what environments they can evolve?
The factor that is necessary to be in the population is the presence of genetic variation in the memes and they can evolve in an environment that selects individuals for this trait due to differential survival and reproduction.
What is the evolutionary mechanism of natural selection?The evolutionary mechanism of natural selection refers to the differential rate at which organisms can survive and reproduce in the presence of variation, which affects a given trait in particular environmental conditions.
Moreover, heritability is due to genetic factors that may be selected by the evolutionary process of natural selection.
Therefore, with this data, we can see that the evolutionary mechanism of natural selection acts to select individuals on the bases of genetic factors that exhibit a certain level of heritability, which is a fundamental issue associated with differential survival rates and reproduction.
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This spice is obtained from stigmas and the spice plant is propagated by corms. This spice is derived from plants in the speciesA.Curcuma longa.(Turmeric)B.Capsicum annuum.(Sweet and chili peppers)C.Myristica fragrans.(Nutmeg)D.Zingiber officinale.(Ginger)E.Crocus sativus.(Saffron)
The stigmas of the Crocus sativus plant, a member of the Iridaceae family, are used to make saffron, a significant spice.
What spice is made from flower stigmas?The Crocus sativus flower's dried stigma is what is used to make saffron. The word "saffron" comes from an Arabic verb that means "to become yellow," alluding to the spice's use as a vibrant yellow dye. Most likely, the Sanskrit term for saffron that gave rise to the Latin word "crocus" in the first place.
Is saffron an instance of corm?The cormose triploid geophyte saffron (Crocus Sativus L.) is not found in the wild. Due to the multiple benefits associated with its stigmatic lobes, it has been grown since ancient times. Corm propagation is the only method of reproduction; seeds do not exist.
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Can dogs regulate their body temperature?.
Dogs can regulate their body temperature by the time they are 7 weeks old.
Dogs have remarkable internal mechanisms that maintain their body at the proper temperature at all times, irrespective of the air temperature because they are unable to endure large changes in their body temperatures.
Dogs do not perspire through the skin as people do due to their insulating coats.
A comfortable winter temperature for most dogs is between 68 and 72 degrees. The same considerations mentioned above for selecting a safe, comfortable summer temperature setting apply to selecting a winter thermostat setting.
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in pea plants, the allele for yellow seeds is dominant to the allele for green seeds. if a plant that has heterozygous yellow seeds is crossed with on
Cross between heterozygous yellow seeded plant and green seeded plant will produce 50% yellow seeded plants and 50% green seeded plants.
In general the cross between two heterozygous plants , the resulting progeny may result in the dominant phenotype. But, the recessive phenotype will also reappears in the generation . The cross between heterozygous yellow seeded plant and green seeded plant will produce 50% yellow seeded plants and 50% green seeded plants.
Hence, Mendel's experiments using pea plants, state that yellow color is autosomal dominant to green and round seeds are autosomal dominant to wrinkled seeds.
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