This is a classic example used in evolution however is used only to explain differences between Lamarckian theory and Darwinian theory, nonetheless with recent tools can be explained in more detail.
Classically is proposed a population of giraffe with certain variations in neck length, this is given by genetics and alleles, all populations possess a certain pool of variation, now according to Darwin the giraffes with longer necks were selected as their fitness survival was increased due to this trait, Giraffes with longer necks could access to more vegetation and nourish better, in consequence, reproduced more than those of short neck, also when competing intraspecifically among giraffes those with longer necks were better competitors increasing also their survival rate, in time giraffes with short neck were extinguished and selective pressure continue favoring those of long neck, this in genetics meant the fixation of the allele of long neck and an increase in the frequency of the same.
What is a result of group behavior that enhances survival?A. being able to run faster than predatorsB. having an easier time finding matesC. having an easier time finding foodD. having the ability to walk long distances with little food
In Biology, group behavior refers to actions made by one organism that help to the survival of another organism in the group.
Some examples are:
• Meerkats have lookouts for predators
,• Bees have designated individuals for different tasks, such as foraging for food or defending the nest.
,• Sharing food resources.
,• Migrating birds fly in formation to conserve energy.
,• Fish swim in schools to avoid predators
One consequence of the organisms living in groups and doing group behaviors is that is easier to find a mate, given that they don't have to travel to find another individual of the same species.
This means that B) having an easier time finding mates, would be the right answer.
Which of the following is the best definition of condution
an enzyme is specific. this means
Enzymes are said to be specific because an enzyme binds to only one or one group of substrates for its activity.
The enzyme's specificity is a property that indicates how restricted the enzyme is in its substrate selection; There would only be one substrate for a completely unique enzyme. Specificity is the capacity of an enzyme to select a specific substrate from a variety of chemically similar compounds. Specificity is a molecular identification process due to the complementary structural and conformational properties of the enzyme and substrate. Since the specific substrate must fit into the enzyme's active site before catalysis can take place, only well-designed molecules can be enzyme substrates; An enzyme will frequently react with a single naturally occurring molecule or substrate.
Learn more about enzymes here:
https://brainly.com/question/6651475
#SPJ4
Help plss, will do brainliest again.
A sphere with a mass of 12 g has a radius measuring 2 cm. What is its density?
0.36 g/cm^3
1.43 g/cm^3
6 g/cm^3
24 g/cm^3
Answer:
A. 0.36 g/cm^3
Explanation:
Hope this is correct for u
What different roles and functions do membrane proteins serve?
Membrane proteins mediate processes that are fundamental for the flourishing of biological cells. Membrane-embedded transporters move ions and larger solutes across membranes, receptors mediate communication between the cell and its environment and membrane-embedded enzymes catalyze chemical reactions.
Which of the following is a way in which mitosis differs from meiosis?A. Mitosis take place to form sex cellesB. Meiosis creates cells with half the number of chromosomes of the original cell.C. Telophase does not take place in mitosis.D. Spermatogenesis and oogenesis occur via mitosis.
Meiosis creates cells with half the number of chromosomes of the original cell. It produces four gamete cells. Mitosis creates 2 identical daughter cells with the same number of chromosomes as of the parent cell.
Meiosis is the process that form sex cells. Telophase is one of the stage of mitosis. Spermatogenesis and oogenesis occurs via meiosis.
Answer - B. Meiosis creates cells with half the number of chromosomes of the original cell.
Why are underfit streams so common in the southern United States?
underfit streams are so common in the southern United States.
What is underfit streams ?
underfit streams are the streams which have to undergone drastically reduction of discharge and which are now too small for the valleys . which they occupy. Reduction should be understood to the refer to channel-forming discharge, which is discharge at or near by the bankfull stage; more the precisely, the reduction is refers to that discharge is frequency which is the corresponds to the channel-forming discharge.
underfit streams are very common in the southern by United States due to glacial melting periods. When the melting occurred water was the fed to form these streams and but due to time passage that are water supply has stopped and not given enough water of to these streams. Hence the underfit stream formations.
To know more about underfit streams click-
https://brainly.com/question/15972786
#SPJ9
3. If a black guinea pig (Bb) were crossed with a white guinea pig (bb), whatwould be the resulting phenotypic ratio?A. 1:0 black to whiteB. 1:1 black to whiteC. 3:1 black to white
If Bb is crossed with bb, the resulting offspring will be 50% Bb and 50% bb. It will have a 1:1 black to white phenotypic ratio.
Answer - B. 1:1 black to white
14. What are two cell surface modifications that we can expect to see on the external side of the plasma
membrane? In what type of cells (1 plant cell modification and 1 animal cell modification) would we
expect to see each type of modification?
The two cell surface modifications we can expect to see on the outside of the plasma membrane is a signaling molecule, or ligand.
What is Receptors and ligands?Receptors and ligands come in many forms, but they all have one thing in common: they exist in closely aligned pairs, with a receptor recognizing only one (or a few) specific ligands, and a ligand binding to only one (or a few) target receptors. Binding of a ligand to a receptor changes its shape or activity, allowing it to transmit a signal or directly produce a change within the cell.
Plasma membrane receptors are membrane-anchored proteins that bind ligands on the outer surface of the cell. In this type of signaling, the ligand does not need to cross the plasma membrane. Therefore, many different types of molecules (including large, hydrophilic or "water-attracted" ones) can act as ligands.
Learn more about plasma membrane in brainly.com/question/14727404
#SPJ1
An engineer wants to develop a model to simulate the safety of varioushelmet materials during a race car crash. Which type of model would bestrepresent this?O A. Conceptual modelOB. Molecular modelOC. Computer modelOD. Mathematical model
The correct answer is C. Computer model
The various parts of the endomembrane system serve different functions in the cell. In this activity, you will identify the roles of each part of the endomembrane system. Match each function to the appropriate bin.
1. protein synthesis
2. protein modification and sorting
3. macromolecule digestion
4. lipid synthesis
5. autophagy
6. cisternal maturation
7. calcium ion storage
8. poison detoxification
a. smooth ER
b. rough ER
c. Golgi apparatus
d. lysosomes
The roles of each part of the endomembrane system are:
Smooth Endoplasmic Reticulum (ER) - lipid synthesis, calcium ion storage and poison detoxificationRough Endoplasmic Reticulum (ER) - protein synthesisGolgi apparatus - cisternal maturation and protein modification and sortingLysosomes - Macromolecule digestion and autophagy.What is the endomembrane system?
Membrane bound organelles that modify, package and move macromolecules such as proteins and lipid molecules in eukaryotic cells are collectively known as the endomembrane system. The various functions of the endomembrane system are:
1,) Protein synthesis: This occurs in the rough endoplasmic reticulum. It contains ribosomes, which help to synthesize secondary structures in proteins.
2.) Protein modification and sorting: This is also done in the rough endoplasmic reticulum. The flattened membrane disks and cisternae perform protein modification.
3.) Lipid synthesis: The smooth endoplasmic reticulum in the liver produces steroid hormones like testosterone and oestrogen from other steroids and lipids.
4.) Macromolecule digestion: This happens in the lysosome. The lysosome is highly acidic and contains enzymes that aid in macromolecule digestion.
5.) Autophagy: This is the process in which damaged cells and protein are eaten or damaged by the lysosome. The macromolecules are broken down and reused by the cell.
6.) Cisternal maturation: It takes place in the Golgi apparatus.
7.) Calcium ion storage: Calcium ion is stored in the smooth endoplasmic and is secreted into the cytosol when it's needed.
8.) Poison detoxification: The smooth ER in the liver detoxifies substances from digestion. It does this by removing the lipid part and making the substance hydrophilic in order to be excreted by the body.
Learn more about the endomembrane system here:
https://brainly.com/question/8010049
#SPJ4
I have not had success figuring out this question for about 4 days now, from an old homework assignment. Please help
Since we now that the change in the first positicion C for a Timine allowed the emergence of lineages A and D, we could say its inverse for the emergence of C and E, that is 1 - T -> C. I attempt that since A and D, are a sister clade with C and E, so we the only change there would be the first base. In the branching point behind A - D; C - E, we could propose a change that precede both clades, of course this is a guess and also it is arbitrary. We could say, 2 - T -> C, that is, in the second position, both couples A - D; C - E have a Citosyne.Therefore we would propose that the branch behind the bifurcation (BBB) following A-D; C-E has in its first two bases -CT-. From this point, we move to the branching point that precedes the clades E-H, and B-G. Let's propose that a change in the third base occurs, that goes from A to G. So we would have in BBB this sequence: -CTA- and in the point we are actually inferring CTG. Then, behind the clade F-H, let's propose a change in the fourth position, that goes from G - A. Following the above procedure, the change behind the B - G clade will be 4 - A to G. So for example in the clade A-D we will have this DNA sequence -TCA. In the clade C-E the DNA sequence will be -CCA-. In the clade F-H -CTGA- while in the clade B-H -CTGG-
where were the simple sugar located on the bean seed?
In seeds, sugar can be found in large amounts in the endosperm. In some species, like beans, the endosperm is absorbed when it reaches maturity, and the cotyledons will be responsible for nourishing the embryos.
Explain how the Meselson-Stahl experiment contributed to our understanding of DNA replication, and describe that process.
REAL ANSWERS ONLY! NO LINKS!
Meselson-Stahl's experiment contributed to our understanding of DNA replication because the use of radioactive nucleotides showed that one DNA strand is synthesized in each round of replication while the other chain remains unchanged, which is known as semiconservative replication.
What is semiconservative replication?In genetics, semiconservative replication refers to the process by which DNA is duplicated during the process of DNA replication. In semiconservative replication, one DNA chain is conserved in intact conditions while the other one is synthesized in the final double helix DNA molecule.
Meselson-Stahl's experiment contributed to the discovery of the semiconservative nature of DNA replication by observing that only one radioactive chain was added to each round of replication.
Therefore, with this data, we can see that the semiconservative replication of the double helix DNA molecule is a fundamental process associated with DNA replication which was discovered by Meselson-Stahl's experiments.
Learn more about semiconservative replication here:
https://brainly.com/question/12452535
#SPJ1
What term describes the conversion of inorganic carbon to organic carbon?A. the carbon cycleB. primary productionC. biotic factorD. succession
Remember that biological carbon fixation is the process by which inorganic carbon (such the carbon dioxide) is converted to organic compounds by living organisms. Now, remember that the biological carbon cycle describes the flow of carbon between the atmosphere and Earth's ecosystems.
We can conclude that the correct answer is:
Answer:A. the carbon cycle
Is stored energy kinetic or potential?
We have to consider that kinetic energy is the one which in-movement bodies have, like atoms, or molecules. So the stored energy could be known as potential energy since it's a reserve the cells or other bodies, materials, atoms, or molecules can use to develop a determined process.
Forest plants are always at risk of being damaged by animals and insects. A bear may decide to scratch his back on a tree trunk or a spider spins a web between the stems. Which of the plant tissues indicated below has the primary function of providing protection for the plant?
Group of answer choices
D
A
C
B
The epidermis is the most superficial layer of a plant and acts as a barrier that prevents the plant from being damaged by external forces, losing water, and being infected. Therefore, option (A) is correct.
What is an epidermis?The epidermis of a plant is a layer of protective tissue that extends throughout the entirety of the plant's surface. The epidermis shields the plant from pathogens and prevents it from drying out. It is responsible for regulating the flow of gas in and out of plant cells. The epidermis is responsible for controlling the release of metabolic byproducts.
It is the most superficial layer of cells on a plant, and it is produced from the protoderm. It covers the stem, the roots, the leaves, the flowers, the fruits, and the seeds. The epidermis and the waxy cuticle that covers it act as a barrier that prevents the body from being damaged by outside forces, losing water, and becoming infected.
Learn more about epidermis, here:
https://brainly.com/question/3522359
#SPJ2
When water changes state from a gas to a liquid, the ____________ of the water remains the same.
mass
volume
color
Answer:
mass
Explanation:
Mass is a measure of inertia which will stay the same no matter the state of matter
What cell shape allows long distance communication
Non-neural cells, both normal and cancerous, communicate over long distances via thin membrane protrusions (TMPs), gap junctions, and exosomes. Long-distance neurons form networks capable of complex computation, which are regulated by macrophage pruning activity.
What is cell?Cells are the fundamental building blocks of all life. Trillions of cells produce the human body. They support the body's structure, absorb nutrients from food, convert those nutrients into energy, and perform specialized functions. A cell is a cytoplasmic mass that is externally bound by a cell membrane. Cells, which are typically microscopic in size, are the smallest structural units of living matter and comprise all living things. Most cells have one or more nuclei as well as other organelles that perform a variety of functions. Cells are classified into two types: eukaryotic cells, which have a nucleus, and prokaryotic cells, which do not have a nucleus but do have a nucleoid region.To learn more about cell, refer to:
https://brainly.com/question/13920046
#SPJ9
Each biochemical reaction involves a specific enzymes to facilitate the change from reactants to products. What property of enzymes allows for the specificity? Explain. HURRYYY PLEASE
Every biochemical reaction involves a specific enzyme to facilitate the change from reactants to products. The property of the enzyme that allows for specificity is because different enzymes have differently shaped active sites.
The shape of the active site of an enzyme is reciprocal to the shape of its specific substrate. This simply means that they are the correct shapes to fit together and function.
Enzymes are highly specific, I.e. a particular enzyme can catalyse a particular reaction only.
Enzymes show different types of specificity as follows:
1. Bond Specificity: This is also called relative specificity. The
enzymes are specific for a bond here.
2. Group Specificity: This is also called structural specificity.
The enzymes are specific to a group here.
3. Substrate Specificity: It is also called absolute specificity. In this, the enzyme acts only on a particular substrate.
4. Co-factor Specificity: This shows that enzymes are specific to their co-factors also.
Learn further about the specificity of the enzymes here:
https://brainly.com/question/8610333
#SPJ1
20. Why would cells die without a membrane?
A plasma membrane, made of a phospholipid bilayer containing proteins that control the transit of chemicals into and out of the cell, separates a eukaryotic cell from the extracellular environment.
Why cells die without a membrane?All cells have a cell membrane, also known as a plasma membrane, which separates the interior of the cell from the external environment. A semipermeable lipid bilayer makes up the cell membrane. The cell membrane regulates the flow of substances into and out of the cell.The proteolytic enzymes known as caspases, which cause cell death by cleaving certain proteins in the cytoplasm and nucleus, mediate apoptosis. All cells contain the inactive precursors of caspases known as procaspases. These procaspases are typically triggered by cleavage by other caspases, resulting in a proteolytic caspase cascade.A plasma membrane, made of a phospholipid bilayer containing proteins that control the transit of chemicals into and out of the cell, separates a eukaryotic cell from the extracellular environment. Loss of this barrier function may affect cellular homeostasis and result in cell death.To learn more about a membrane refer to:
https://brainly.com/question/1768729
#SPJ10
Describe any variation (numerical and non-numerical) between individual replicate
measurements for the respiratory-rate experiment (before and after exercise).
The independent variables of measuring physical properties are given below -
What is physical properties?
A physical properties in any property that is measurable, whose value describe a state of physical system.
The changes in the physical properties of a system can be used to describe its changes between the momentary that state of
physical properties are often referred to as observables.
They are not modal properties.
Any variable that can be attributed a value without attributes a value to any to any other variables is called independent variables.
It is a variable that stands alone and isn't changed by other variables you are trying to measure.
To know more about physical properties click-
https://brainly.com/question/19921381
#SPJ9
Which of the following best identifies where the energy stored in a nut originally came from? ATP stored during photosynthesis, glucose from cellular respiration, sunlight during photosynthesis? During what process was this energy stored in the nut? Cellular respiration, anabolism, photosynthesis?
The energy stored in the nut originally came from photosynthesis which involves use of sunlight energy, water and CO2 to form simple sugars
What is Photosynthesis ?Plants use sunlight, water, and carbon dioxide to produce oxygen and sugar-based energy through a process known as photosynthesis.
Photosynthesis is a major component of life on Earth. Plants, algae, and some bacteria carry out the process by utilising sunlight to create oxygen (O2) and chemical energy that is stored in glucose (a sugar).We know that the energy source used to create the nut originally came from photosynthesis because the nut is made from a plant. Oxygen gas and glucose sugar are produced during photosynthesis using sunlight, carbon dioxide, and water.Learn more about Photosynthesis here:
https://brainly.com/question/19160081
#SPJ13
I need help with this practice Give a general description of Kudzu If you do not know some info that’s fine :)
• Where it comes from: ,Comes from Japan. Lives in places with lots of sunlight. Your flowers are small. It originates from Asia but is present in North America (The United States and Canada). It has become a problem for killing native species.
• What it eats: ,Plants are autotrophs (they make their own food). Kudzu is a plant, so it makes its food. The fact that it grows on other plants helps it to obtain solar energy and carry out even more photosynthesis,.
,• Disgusting Characteristics: ,Kudzu grows on other plants and trees quickly and thus suffocates and kills other plants by heavily blocking sunlight.
Kudzu is non-toxic, and in some regions, it is used with food and medicine.
The plant's only problem is killing plants by blocking sunlight.
chloroplasts are energy organelles found in what? is it animal cellsplant cellsplant and animal cellsall living cells???
Chloroplasts are found in plant cells.
They can also be found in some algae.
Complete the following sentence: Hemoglobin functions in ______ cells and carries ______ to all cells of the body.neural; neurotransmitterswhite blood; carbon dioxidered blood; oxygenbone; calcium
Hemoglobin functions in red blood cells and carries oxygen to all cells of the body.
Answer:
Complete the following sentence:
It functions in red blood cells, and transfers oxygen.
so:
Hemoglobin functions in red blood cells and carries oxygen to all cells of the body.
mark as brainliest :D
Matter is fixed in single states based on the composition of its atoms.
OA. True
OB.
False
According to the research, the correct answer is B. The statement "Matter is fixed in single states based on the composition of its atoms" is false.
What is Matter?It is everything that occupies a space and is subject to interactions and changes over time in nature, constituting the substances around us and that can be transformed.
In this sense, since it is susceptible to all kinds of forms and to undergo changes, it is found everywhere and in any physical state:
SolidLiquidGaseousTherefore, we can conclude that matter is made up of atoms and is subject to transformations and interactions that it occupies space and has mass, thus the correct answer is B.
Learn more about matter here: https://brainly.com/question/29040585
#SPJ1
What is biomagnification?
more concentration of toxins in producers.
lower concentrations of toxins as you move
up the food chain.
higher concentrations of toxins as you move
up the food chain.
Answer:
the concentration of toxins in an organism as a result of its ingesting other plants or animals in which the toxins are more widely disbursed.
Explanation:
Question #22
Which two stages are most responsible for the genetic variation observed within a species?
A Anaphase I and Prophase I
B Anaphase II and Metaphase II
C Metaphase I and Metaphase II
D Metaphase I and Prophase I
Independent Assortment, Random Fertilization and recombination takes place during Metaphase I and Prophase I. Therefore, option (D) is correct.
What causes genetic variation in a species?Prophase I is when recombination or crossing across happens. Gene by gene, identical chromosomes—1 from each parent—pair along their lengths. Chromosomes break along their length, reunite, and exchange some of their genes. The chromosomes now contain a distinctive collection of genes. This causes genetic variation.
Random Fertilization and Independent Assortment in Metaphase I
The tetrads travel to the metaphase plate during metaphase I with their kinetochores pointing in opposite directions. The homologous pairs randomly align themselves with the equator. This occurrence is the second process that modifies gametes or spores.
Learn more about genetic variation, here:
https://brainly.com/question/16951216
#SPJ1
What 3 regions are used for auditory?
The human auditory is divided into 3 parts:
1. The outer ear- involving the externally visible portion of the auditory system along the ear canal.
2. The middle ear - this part transmits sound vibration from the end of the ear canal to the cochlea.
3. The inner ear- the primary organ of the inner ear is the cochlea, the cochlea is responsible for transmitting sound information to the nervous system.
