The most likely cause for this pattern is stabilizing selection. When the population stabilizes on a given characteristic value and genetic variation declines, stabilizing selection takes place.
Stabilizing selection is a kind of natural selection in which the population mean stabilizes on a specific non-extreme trait value. Because most qualities don't seem to change significantly over time, this is regarded to be natural selection's most frequent mode of operation.
High and low birth weights are associated with decreased survival in both males and females, making birth weight a classic example of a feature that is subject to strong stabilizing selection.
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what kind of protist is this? group of answer choices ciliate plasmodial slime mold flagellate foram
The kind of this protist is plasmodial slime mold.
Thus, the correct option is B.
What is protist?Protists аre simple eukаryotic orgаnisms thаt аre neither plаnts nor аnimаls or fungi. Protists аre unicellulаr in nаture but cаn аlso be found аs а colony of cells. Most protists live in wаter, dаmp terrestriаl environments or even аs pаrаsites.
Kingdom Protista is classified into the following:
ProtozoaSlime mouldsChrysophytes, Dinoflagellates and EuglenoidsWhat is plasmodial slime mold?Plasmodial slime molds (myxomycetes) are а group of fungus-like orgаnisms usuаlly present аnd sometimes аbundаnt in terrestriаl ecosystems. The myxomycete life cycle involves two very different trophic (feeding) stаges, one consisting of the uninucleаte аmoebаe, with or without flаgellа, аnd the other consisting of а distinctive multinucleаte structure, the plаsmodium.
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The expanded articular end of an epiphysis that is separated from the shaft by a narrower neck is called a.
The expanded articular end of an epiphysis that is separated from the shaft by a narrower neck is called a Head.
The body constantly remodels the living, active tissues that make up bones. They sustain the body's structure, safeguard important organs, and provide movement of the body. They also serve as a space for the bone marrow, which the body uses to produce blood cells, and a repository for minerals, particularly calcium.
There are two different forms of tissue that make up bones.
A hard, dense, robust, and long-lasting outer layer is called compact (cortical) bone. It creates the outer layer of bone and accounts for around 80% of mature bone mass.The remaining 20% of bone is made up of trabecular (or spongy) bone, which is made up of a network of rod-like structures called trabeculae. Compared to compact bone, it is lighter, less thick, and more flexible.Head is a conspicuous, rounded bone extension that is a component of a joint. It has a neck that separates it from the bone's shaft. Inside a synovial capsule, the head is often coated in hyaline cartilage.
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swelling; fluid leaks out into tissue spaces: a.edema b.dyscrasia c.ecchymoses d.autologous transfusion e.petechiae
Edema occurs when fluid leaks into tissue spaces during swelling.
What is edema?
Edema, as mentioned, is the swelling that is caused due to excess fluid in our body’s tissues. It may effect any part of our body, but most commonly is noticed in hands, feet, ankle, etc. Your skin can be stretched due to edema, and the swelling can increase, if not treated on time and cause serious health issues.
There are many causes of edema which include pregnancy, medications, infections and even excess sodium. It is also caused due to congestive heart failure or a block in leg vein.
Therefore, edema is nothing but swelling caused due to excess accumulation of fluid in tissues.
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When building a new
complementary strand, each
strand of the DNA molecule
serves as which of these?
During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied.
What is template?
The DNA polymerase enzyme bases the replication of DNA on a single strand of DNA known as a DNA template.
The double-stranded DNA is divided into two single-stranded molecules during the replication process. After working with these single strands, the DNA polymerase creates a fresh second strand of DNA on each of the two single strands. You just need one strand of DNA, which may be used as a template to replicate the missing strand of DNA thanks to complementary base pairing in DNA (A-T and G-C).
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explain what features of endospores make them so resistant to microbial control, and how sterilizing techniques work to destroy them.
Endospores are resistant to environmental stresses that would usually result in the bacterium's death. These stresses include high temperature, intense UV irradiation, desiccation, chemical damage and enzymatic degradation.
Because they contain less water and have a slower metabolism than vegetative organisms, bacterial endospores are more resistant to disinfectants. Not all microorganisms respond to disinfection in the same way. However, there are two ways to eliminate bacterial endospores. The first technique involves spore killing at high temperatures. The second technique involves reactivating endospore germination to produce active bacteria that can be quickly eliminated using conventional sterilizing techniques.
The dehydration of the core protoplast caused and maintained by the osmotic activity of enlarged electronegative peptidoglycan polymer may be the cause of the exceptional heat resistance of bacterial endospores.
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List three factors that affect climate and tell what conditions they modify
The three factors that affect climate include the following below:
Ocean currents.Wind and air masses.Altitude.What is Climate?This is referred to as the atmospheric condition of a place in a long time and is affected by different types of factors such as ocean currents, altitude etc.
The ocean current is responsible for the distribution of heat and moisture all around the world. It can also store radiations from the sun which helps prevents its uneven distribution.
Wind and air masses are also among the factors because they are involved in the movement of a weather pattern such as heat etc from one place to another. People living in areas which have a high altitude means they have a very cold climate due to the presence of low air pressure.
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blood flows through a coronary artery that is partially blocked by deposits along the artery wall. blood flow through which part of the artery is the flux (mass of blood per unit time) largest?
Blood flows through a coronary artery that is partially blocked by deposits along the artery wall then blood flow through which part of the artery is the flux largest: flow rate is the same in both parts.
How does blood flow?Blood flows through a network of vessels that is called the circulatory system. When blood returns to the heart, it flows to the lungs to receive oxygen. Then the heart pumps the blood out to the rest of body and the process begins again.
Coronary arteries supply blood to the heart muscles which needs oxygen-rich blood to function and oxygen-depleted blood must be carried away.
Coronary arteries receive the maximum blood flow during diastole because this is when the heart is relaxed, and they receive least blood flow during systole because this is when the myocardium contracts are decreasing the blood flow through coronary arteries.
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what techniques could be used to demonstrate that a mutation in a man with hemophilia is due to the insertion of an alu element into the coding sequence of the x-linked gene for factor viii, one of the proteins needed for efficient blood clotting in humans?
Therefore, if a guy inherits an X chromosome that has a mutation in either the factor VIII or factor IX gene, they may develop a disease similar to hemophilia. Hemophilia can also affect women, however this is far less common. In these situations, either both of the X chromosomes are afflicted, or one is affected while the other is absent or inactive.
What is Mutation ?A mutation in biology is an adjustment to the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA. DNA or RNA can be found in the viral genome.
Mutations that are harmful can result in cancer or genetic diseases. A genetic disorder is a condition brought on by a change in one or more genes. Cystic fibrosis is a human example. A single gene mutation causes the body to create thick, sticky mucus that obstructs digestive organ ducts and clogs the lungs.
Missense, nonsense, insertion, deletion, duplication, and frameshift are just a few categories of gene mutations. The advent of lethal diseases like cancer is one of the main consequences of a gene mutation.
What is Hemophilia ?An genetic bleeding ailment called hemophilia causes the blood to clot improperly. This may result in both spontaneous bleeding and bleeding after injury or surgery. Blood contains a variety of clotting proteins that can aid in halting bleeding.
A moderate form of hemophilia A or B usually results in substantial bleeding after an accident. Additionally, you can have bleeding after an injury if you have hemophilia A or B in its most severe forms. spontaneous bruising of the muscles or joints
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why are most stray cats short haired cats
Most stray cats are short haired cats because according to the American Humane Society, roughly 95% of all cats are short hair cats.
What are cats?The cat is a domestic species of small carnivorous mammal which is the only domesticated species in the family Felidae and is commonly referred to as the domestic cat or house cat to distinguish it from the wild members of the family.
So most cats have shorts hairs and doesn't just apply to stray cats. Research claims that some people claim that long hair cats are more expensive and rare, so the owner is likely to take better care of them and keep them indoors.
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in horses, crossing a chestnut brown horse with a creamy white horse can result in a palomino horse that is light brown in color (see below). this is an example of:
Example is Incomplete dominance leads to the inheritance of the palomino coat color in horses.
How does incomplete dominance differ from codominance?There are two different types of genetic inheritance: full dominance and codominance. Codominance basically means that neither allele is able to suppress or obstruct the expression of the other allele. However, incomplete dominance occurs when a dominant allele only partially obscures the effects of a recessive gene.
How can you determine if something has partial dominance?When a dominant allele, or form of a gene, does not entirely block the effects of a recessive allele, the resultant physical appearance of the organism reveals a mixing of both alleles. It is also referred to as partial or semi-dominance.
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The spinal column is sometimes referred to as the backbone
True Or False
The statement the spinal column is sometimes referred to as the backbone is TRUE because it provides structural support to the body.
What is the spinal column in the human body?The spinal column is a series of vertebrae which include cervical spine vertebrae, thoracic spine vertebrae, lumbar spine vertebrae and sacral spine vertebrae. These bones are able to support the weight of the body.
Therefore, with this data, we can see that the spinal column in our body provides a structure that supports the human body.
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Which of the following statements concerning
platelets is INCORRECT. Platelets:
The statement that is incorrect about platelets is that the life span of platelets is between 30 and 60 days.
The correct option A.
What are platelets?A platelets is described a tiny, disc-shaped piece of cell that is found in the blood and spleen. Platelets are pieces of very large cells in the bone marrow called megakaryocytes. They help form blood clots to slow or stop bleeding and to help wounds heal.
When platelets are low, dangerous internal bleeding can occur when your platelet count falls below 10,000 platelets per microliter. Though rare, severe thrombocytopenia can cause bleeding into the brain, which can be fatal.
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The complete question:
Which of the following statements about platelets is INCORRECT?
A
The life span of platelets is between 30 and 60 days.
B
Platelets are essential for the clotting process.
C
Platelets contain serotonin, ADP, calcium, and PDGF.
D
Platelets are fragments of a larger cell called a megakaryocyte.
E
The formation of platelets is regulated by the hormone thrombopoietin
2. what are the correct names for the bumps and fissures that make the cerebral cortex appear wrinkled?
Gyri are the correct name for the bumps and fissures that make the cerebral cortex appear wrinkled.
The cerebral cortex, the outer layer of the brain, is extremely unlevel and has a characteristic pattern of folds and grooves called sulci and gyri. The brain's lobes are split in humans by a variety of ridges and grooves. Gyri (bumps) and sulci (groves or fissures) are the terms for them. More cerebral cortex matter can fit inside the skull thanks to the folding of the brain and the accompanying gyri and sulci, which increase the surface area of the brain.
Gyri and sulci are the terms used to describe the folds and grooves in the brain. The folding of the cortex, the area of the brain in charge of higher cognitive functions including memory, language, and awareness results in the development of certain morphological characteristics.
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What are the three common patterns of population distribution? a. clumped, random, and curved b. evenly spaced, clumped, and curved c. clumped, evenly spaced, and random d. random, curved, and evenly spaced please select the best answer from the choices provided a b c d
The three common patterns of population distribution are c. clumped, evenly spaced, and random.
According to three basic patterns of population distribution, describe all the three ways?organisms in a given population can display:
1) Uniform Dispersion: Uniform dispersion is the distribution of organisms within a population such that they are evenly spaced from one another and are more or less evenly distributed throughout an area.
2) Random dispersion- This is evident when the organisms in a population are dispersed randomly, meaning that there is no discernible pattern between them.
3)Clumped: This is a term used to describe creatures that create clumps or clusters when they are present.
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during the refractory period, the cell a. is insensitive to further stimulation; b. responds to even weak stimuli; c. reverses the direction of the action potential; d. generates many local potentials e. increases the strength of the action potentia
During the refractory period, the cell responds to even weak stimuli.
Option B is correct.
What takes place during the refractory stage?The time period immediately following an orgasm during which a person is not sexually responsive is known as the refractory period. Both mental and physical repercussions may result from the refractory phase. A person may become uninterested in or incapable of having intercourse during the refractory period.
Why is it vital to understand the refractory period?An essential component of neural signaling is the pace of generation of action potentials, which is constrained by the refractory period. The refractory period also makes it easier for the action potential to go in a single direction along the axon.
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In 3 to 5 sentences, describe the relationship between a glucose molecule and the products it makes during cellular respiratio
PLEASE HELP I NEED IT
Answer:
Explanation:
During Cellular Respiration, glucose is broken down into many different pieces turning into pyruvate and releasing electrons. During cellular respiration, this is a process known as glycolysis and takes place in the cytoplasm. The pyruvate then oxidizes (meaning it loses the electrons which produce energy) and turns into acetyl CoA which is used in the Krebs/citric acid cycle.
which statement is true about enzymes in the human body? which statement is true about enzymes in the human body? enzymes in the human body usually work best at normal body temperature. enzymes in the human body always work better as the temperature decreases. enzymes in the human body always work better as the temperature increases. enzymes in the human body work just as well at any temperature.
The correct statement is option A: enzymes in the human body usually work best at normal body temperature.
The body's normal temperature, which is around 98.6° F (Fahrenheit) or 37°C, is where most enzymes in the human body function optimally. They might still function at lower temperatures, but considerably more slowly. Therefore, option A is the right choice.
Enzymes function as biological catalysts that quicken biochemical reactions. The most popular explanation proposes that enzymes bind to the substrate molecule and create a transition state. As the reaction proceeds, an energy barrier that the substrates must cross separates the products from the substrates.
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Which of the following is true about ecological succession?
O secondary succession is much slower than primary succession
O Primary succession comes after secondary succession
O During succession one species replaces another species over time
O a tornado would cause primary succession to occur
O secondary succession occurs when bare rock is colonized by organisms such as algae
Answer:During succession one species replaces another species over time
Explanation:example: If lichen comes first, then grass or whatever will gradually replace the the lichen (or another example, that one was kinda bad)
mucous membranes are a part of mucous membranes are a part of adaptive defense. cell-mediated immunity. the complement system. innate defense. humoral immunity.
Mucous membranes are a part of an innate defense that provides the first line of protection against ingested and inhaled infectious agents.
What is innate immunity?
It is a nonspecific type of defense mechanism which is present by birth. It protects us against all antigens and does not depend on prior contact with microorganisms.
It consists of different types of barriers:
Physical barriers: Skin and mucous membrane are the main physical barriers that help in preventing the entry of microorganisms and trapping it.Physiological barriers: HCL in the stomach, saliva in the mouth, tears from the eyes, etc.Cellular barriers: Polymorpho-nuclear leucocytes, monocytes, natural killer cells in the blood, and macrophages in the tissues. They phagocytose and destroy the microbes.Cytokine barriers: Cytokines are secreted by the immune cells that protect the non-infected cells from further infection.Adaptive defense is also called acquired immunity which is pathogen-specific. Humoral immunity produces antigen-specific antibodies and is primarily driven by B cells. Cell-mediated immunity does not depend on antibodies and is primarily driven by mature T cells.
Hence mucous membrane comes under the physical barrier of innate immunity which prevents the entry of microorganisms.
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The graphs below show the rates of
photosynthesis over two days. Besides
light intensity, what factor might explain
the differences between the rates
during the daytime?
Since photosynthesis predominates during the day, there is a net emission of oxygen. At night, respiration continues even though photosynthesis stops, resulting in a net oxygen consumption.
What differences between the rates during the daytime?The rate of photosynthesis will increase as you go from low light intensity to highlight intensity because there is more light available to power the processes of photosynthesis.
The amount of light is also affected by other elements like curtains, trees outside the window, weather, the time of year, shade from nearby structures, and the condition of the windows.
Therefore, Inside a house or business, reflective, light-colored surfaces tend to boost light intensity whereas dark surfaces reduce it.
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PLS HELP ITS FOR MY EATH SCIENCE CLASS?!?!
Our closest exoplanet and Earth-sized planet is Proxima Centauri b.
Proxima Centauri b is in the habitable zone, but why is it not a suitable
Earth 2.0?
A enormous amounts of radiation from mega flares hit the planet
roughly once every year
B it lacks an atmosphere, therefore most likely lacks water
C extreme temperature changes on the surface
D all of the above
Answer:
A
Explanation:
https://phys.org/news/2018-04-proxima-centauri-flare-powerful-visible.html
B cannot be correct because there is in fact, water on Proxima Centauri B.
It most likely isn't C, I researched for any truth in answer C but I couldn't find any.
Hope this helps! I'm really sorry if I'm wrong because I tried very hard to look for a solid answer :[
When cells have a higher concentration of electrolytes outside the cell than inside, water will flow.
When cells have a higher concentration of electrolytes outside the cell than inside, water will flow into the cell until the concentration equalized.
What are electrolytes ?In a solution An electrolyte is a substance when molten, ionizes and conducts electricity, it can be either weak or strong electrolyte.
A weak electrolyte is defined as a solution in which only small fraction of the dissolved solute exists as ions where as in strong electrolyte complete electrolyte dissolves in water.
Weak electrolyte has medium level of conductivity, Strong electrolyte Contains a complete solute, so it has strong conductivity and Non-electrolyte has little or no conductivity.
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true or false? during atrial contraction, the papillary muscles are relaxed, and av valves are open
TRUE. During atrial contraction, the papillary muscles are relaxed and av valves are open..
The cardiac cycle is accompanied by brief negative deflections in the primarily forward-moving blood in the veins caused by atrial contraction of the heart, which produces pulse waves that are conveyed from the heart into the venous system.
Just before ventricular systole, atrial contraction gives the ventricular volume one more boost. When the pressure in the ventricle surpasses the pressure in the atrium due to ventricular contraction, the mitral valve closes.
The atrial contraction, also known as the atrial kick, is the last stage. It occurs when the cardiac muscle in the atrium contracts, increasing pressure and causing more blood to flow past the mitral valve. 20% to 30% of the total diastolic volume crosses the mitral valve at this final stage.
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If ATP is not present, the Calvin cycle will shut down. True or false?
Answer: True
Explanation:
1. during transduction involving a p1 phage, a. any small fragment of the bacterial chromosome may be transferred to another bacterium by a new phage. b. only a specific fragment of dna may be transferred to another bacterium by a new phage. c. any small fragment of the bacterial chromosome may be transferred during conjugation. d. only a specific fragment of dna may be transferred during conjugation.
During transduction that is involving a P1 phage : a.) any small fragment of the bacterial chromosome may be transferred to another bacterium by bacteriophage.
What is transduction ?Process by which a virus transfers genetic material from one bacterium to the another is called transduction and viruses called bacteriophages infect bacterial cells and use them as hosts to make more viruses.
Phage P1 mediate generalized transduction between E. coli strains and the other Gram-negative bacteria.
P1 genes that are expressed in the lytic pathway are those that are involved in the timing of phage development, in replication, in formation of phage particles, including headful packaging and then finally in cell lysis to release the phage progeny.
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How many chromosomes would a cell have after mitosis if it has 24 chromosomes during interphase?
If a cell has 24 chromosomes during interphase then after mitosis or mitotic division it will have 24 chromosomes.
Interphase is the resting phase between successive mitotic divisions of a cell, or between the first and second divisions of meiosis.
Mitosis or mitotic division is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
If a cell has 24 chromosomes during interphase then the daughter cell resulting from mitotic division or mitosis will have 24 chromosomes.
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what is the effect of types of artificial sweeteners on co2 production from alcohol fermentation of splenda and sweet n' lo by yeast
Using theories of sweeteners, we find that C0₂ production increases when artificial sweeteners is added from alcohol fermentation of splenda and sweet 'n' lo by yeast.
Sweeteners are the ingredients that sweeten like sugar (sucrose), but may be low-calorie of synthetic substitutes. Under EU legislation, food products containing the sweetener or sweeteners must include the statement ‘with sweeteners’ on label accompanying the name of the food product. The relationship between sweeteners and negative health effects which has been studied for many years by many of different regulatory agencies, and after rigorous safety assessments and establishment of safe levels of use, certain sweeteners have been approved as the food additives.
Hence, on addition of different types of artificial sweeteners, CO₂ production increases from alcohol fermentation of splenda and sweet n lo by yeast.
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what is the name of the paired parts of a hemostat that span between the box lock and the finger rings?
Shanks are the paired parts of a hemostat that span between the box lock and the finger rings.
A hemostat (too called a hemostatic clamp, blood vessel forceps, or pean after Jules-Émile Péan) could be a surgical instrument utilized in numerous surgical strategies to control bleeding.
For this reason, it is common within the starting stages of surgery for the introductory cut to be lined with hemostats near blood vessels anticipating ligation. The hemostat has handles that can be held in put by their locking mechanism.
The locking instrument is regularly an arrangement of in an ever altered locking teeth, s on each handle, that permit the client to alter the clamping drive of the pincers. When bolted together, the drive between the tips is around 40 N (9 lbf).
The most punctually known drawing of a turning surgical instrument dates back to 1500 BC on a tomb at Thebes, Egypt.
Afterward Roman bronze and steel pivot-controlled rebellious were found in Pompeii. Within the ninth century Advertisement, Abulcasis made outlines of turning disobedient for tooth extraction.
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13. would putamen neurons fire as a person is reaching for a doughnut, or in anticipation of the reach? would the firing correspond with the position of the doughnut or with the starting position of the arm? what does this suggest about the role of the putamen?
Neurons of the putamen are fired in the anticipation of the reach of the object.
Neurons of the putamen would fire in anticipation of the reach .Instead of the arm's location, the doughnut's position would be matched by this firing. This suggests that the putamen is more crucial for encoding the decision to move in the direction of a goal than the actual movement.
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garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat. what happens to the other members of the food chain if the garden is removed?
The number of snails and birds decrease in the given food chain.
Food chain refers to the order of events in an ecosystem, where one living organism feeds another organism, and after that organism is consumed by another organism in higher tropic level.
The food chain always begins with producers who make food, proceeds with other consumers who eat the food and at the comes the topmost predator. In ecology food chain is considered as the series of events that transfer energy and food from one organism to another and is necessary for survival of the organisms .
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