the oldest fossils to be designated homo sapiens are _____. multiple choice question. cro-magnons australopithecines neandertals ardipithecines

Answer:

Peppered moths get their color in lieu to become the fittest among all so that they can survive easily.

Answer/Explanation:

Differential reproductive success.

When the Birch(white) trees were covered in soot(making them black). The black pepper months could blend in to the tree while the white moths stood out.

When the Birch(white) trees were clean and white. The white pepper moths could blend in to the tree while the black moths stood out.

This is an example of differential reproductive success. Who ever could blend in with the tree had the better genes because it made them difficult to be spotted. The other type of moth would be not so lucky, easily spotted an eaten. The better gene lead is "successful," because that moth could live longer because of its characteristics..

Answer: Arctic foxes have several adaptations that allow them to survive. Their round, compact bodies minimize surface area that is exposed to the cold air. Their muzzle, ears, and legs are short, which also conserves heat.

Explanation:

Answer:

mitotic division

Explanation:

Answer:

gain-of-function

Explanation:

Gain-of-function mutations represent a type of genetic change that may confer a new function to the gene that undergoes the mutation. In this case, a gain-of-function mutation conferred to the virus an adaptive advantage by allowing it to encode a new protein which is capable of attaching to the cell membrane of a new host. In this regard, it is important to note that loss-of-function mutations are quite common in nature, while gain-of-function mutations are relatively rare.

RNA molecules fold into complex 3-D structures when base pairing occurs between nitrogen base pairs. The bonds forned are hydrogen bonds.

RNA molecules refers to nucleic acids which are built from ribose sugar molecules instead of deoxyribose as in DNA molecules.

RNA molecules as in DNA are composed of a sugar backbone, a nitrogenous base, and phosphodiester linkages.

The nucleotides found in RNA molecules are:

RNA is able to form complex 3-D structures even though they are single-stranded because of base pairing that occurs between adenine and uracil, and guanine to cytosine.

The bonds present in thebase pairs are hydogen bonds.

Hydrogen bonds are bonds which are formed between hydrogen and a highly electronegative atom such oxygen, nitrogen, chlorine, and fluorine.

In the RNA molecule, hydrogen bonds form betweenthe oxygen and nitrogen atoms of the either uracil, adenine, cytosine, or uracil.

These hydrogen bonds results in three-dimensional structures of RNA.

In conclusion, RNA molecules are single-stranded nucleic acids materials.

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Answer:

What would explain the change in reaction rate —degradation of cellulose by the enzyme cellulase—after 75 minutes is the depletion of the substrate on which the enzyme must act.

Explanation:

A chemical enzymatic reaction, such as cellulase degradation of cellulose, occurs until the substrate is consumed.

The solution to which cellulase is added has the same concentration of cellulose, and what is done is to add enzyme. In the graph you can see that the reaction takes place over time, decreasing the amount of glucose obtained. From 75 minutes onwards the reaction rate decreases as well as the amount of glucose obtained from the reaction, which is due to the fact that the substrate —cellulose— is being depleted.

Answer:

50%

Explanation:  

                     A                 A

A                   AA              AA

a                   Aa               Aa

the chance is 50%

Yes, Anaphase I of Meiosis and Mitosis are different. In Mitosis, the sister chromatids are pulled apart and moved to opposite poles, while in Meiosis I, homologous chromosomes are pulled apart and moved to opposite poles.

What is Meiosis?

Meiosis is a specialized form of cell division that produces cells with half the number of chromosomes of the parent cell. This process is essential for sexual reproduction as it is responsible for generating the male and female gametes that are then used to create a new organism. During meiosis, the chromosomes of the parent cell are divided into two sets of daughter cells, each with half the number of chromosomes of the parent cell. This process is also referred to as reductional division because it reduces the number of chromosomes in the daughter cells.

Therefore, Yes, Anaphase I of Meiosis and Mitosis are different.

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Answer:

C- active transport

Explanation:

Because energy is required in this process, it is known as 'active' transport. Examples of active transport include the transportation of sodium out of the cell and potassium into the cell by the sodium-potassium pump. Active transport often takes place in the internal lining of the small intestine.

Answer: C. Active transport. In cellular biology, active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement. Please mark brainliest!

Answer:

Both require a vacuum and a compound microscope has greater magnification ability than a simple microscope.

Explanation:

Answer:  

I think its D correct me if wrong

Explanation:

Hope this helps! :)

Answer:

C. The complete set of reactions carried out by a cell.

Explanation:

Rr , RR and rr are the possible genotype combinations for their offspring .

Explanation:

Answer:

RR rr Rr

Explanation:

The statement that is true is that the process of osmosis can be reversed by altering the pressure gradient (option B).

Osmosis is the net movement of solvent molecules, usually water, from a region of lower solute concentration to a region of higher solute concentration through a partially permeable membrane.

Osmosis cannot occur without the presence of a semi-permeable membrane.

The principle behind osmosis is the concentration gradient i.e. concentration difference between external and internal environment.

However, the osmotic process can be reversed if the pressure gradient is changed or altered because it is the basis of the movement.

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Explanation:

In the small intestine, enzymes are secreted on the food substances for digestion to take place before absorption in the villi in the small intestine occurs.

For carbohydrates,they are initially called maltose hence the enzyme maltase is secreted on the maltose to convert it into glucose molecules which is needed for the body.

For proteins,they are initially called peptides and polypeptides.An enzyme erepsin is secreted on the peptides and the polypeptides by the small intestine to convert them to amino acids which is also needed by the body.

For fats and oils,they are digested in the duodenum by an enzyme called lipase which coverts them to fatty acids and glycerol before it gets into the small intestine to be absorbed.

I HOPE IT'S OK?

that ABO blood type demonstrates multiple allele inheritance of what multiple allele inheritance means. In humans, the ABO blood type is determined by three alleles - A, B, and O. Each person one from each parent, and the are combination  these two alleles determines their blood type.

The A and B alleles are co-dominant, meaning they both express their phenotype when present together. The O allele is recessive and only expresses its phenotype when paired with another O allele. This results in four possible blood types - A, B, AB, and O. So, the inheritance of ABO blood type involves multiple alleles interacting in a complex way to determine a person's phenotype.

The ABO blood type is a trait that demonstrates the type of inheritance known as "codominance." the term are we the "codominance" refers to the type of inheritance exhibited by the ABO blood type  codominance, both alleles for are specific trait are expressed equally in an individual's phenotype, and neither allele is masked or dominates the other. The explanation for this is that ABO blood types have three alleles (A, B, and O), with both the A and B alleles being dominant over the O allele, and the A and B alleles are codominant with each other, leading to four possible blood types: A, B, AB, and O.

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Some of the ideas he came up with about making an hypothesis is that if a fruit has more than x grams of sugar per kilogram of mass, then people who taste it will think it tastes sweet and is denoted as option A.

This is referred to a proposed explanation for as particular phenomenon and the phrase used is that of an if-then statement. This is regarded as a scientific method and is involved in the creation of theories etc.

Hypothesis to be ascertained if it is true or not by conducting different types of experiments by people before it then becomes a law which is used all over the world.

The hypothesis in the option which has an if-then statement is If a fruit has more than x grams of sugar per kilogram of mass, then people who taste it will think it tastes sweet which is why option A was chosen.

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Answer:

the periodic table

Explanation:

the periodic table show all the element to your answer

Answer:

The periodic table

Explanation:

Dark Matter is responsible for the accelerating expansion of the Universe.

The energy from the Big Bang flocks the universe's untimely expansion. Since then, gravity and dark matter have occupied in a cosmic tug of war. Gravity drags galaxies closer to each other; dark matter propels them apart. while the universe is expanding or shrinking depends on which force influences, gravity or dark matter. Observations of the explosions of white dwarf stars in binary systems, so-called Type 1a supernovae, in the 1990s then led scientists to the conclusion that a third component, dark matter, made up 68% of the cosmos, and is responsible for driving an acceleration in the expansion of the universe. Dark matter is the name given to the most mysterious force that gives rise to the rate of expansion of our universe to accelerate over time, rather than slow down.

so we can conclude Dark Matter is responsible for the accelerating expansion of the Universe.

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Answer:

Renewable and nonrenewable resources are energy sources that human society uses to function on a daily basis. The difference between these two types of resources is that renewable resources can naturally replenish themselves while nonrenewable resources cannot.

Mycelia have a large surface area for absorption.

Mycelium is a fungus root-like structure made up of branching, thread-like hyphae. Mycelium-based fungal colonies can be found in and on soil as well as many other substrates. Mycelia play an important role in the breakdown of plant material in terrestrial and aquatic habitats. They contribute to the organic part of soil, and their growth releases carbon dioxide back into the atmosphere.

Mycelium can be unappealing since it might appear as white fuzz that resembles mould. While we would never advocate eating anything mouldy or mushrooms without first confirming that they are suitable for human nutrition, most mycelium is safe to consume and completely edible.

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The answer choice responsible for the increased growth of algae in dead zones is elevated phosphorous and nitrogen in the water (Option C).

Deаd zones аre low-oxygen, or hypoxic, аreаs in the world's oceаns аnd lаkes. Becаuse most orgаnisms need oxygen to live, few orgаnisms cаn survive in hypoxic conditions. Deаd zones аre the most severe result of eutrophicаtion. This drаmаtic increаse in previously limited nutrients cаuses mаssive аlgаl blooms. These "red tides" or Hаrmful Аlgаl Blooms cаn cаuse fish kills, humаn illness through shellfish poisoning, аnd deаth of mаrine mаmmаls аnd shore birds.

Nitrogen аnd phosphorous from аgriculturаl runoff аre the primаry culprits, but sewаge, vehiculаr аnd industriаl emissions аnd even nаturаl fаctors аlso plаy а role in the development of deаd zones.

Thus, the correct option is C.

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Answer:

So, assuming the dice are 'fair' (that each of the six numbers has a probability of 1/6 of showing up on each of the dice), there is a probability of 1/36 that all three dice will show the same number.

Explanation:

Answer:

Explanation:

The number of copies of an allele in a population divided by the total number of all alleles for that gene in a population is the allele frequency. For a gene with two alleles whose frequencies are p and q, the Hardy-Weinberg equation states that the genotypes that are possible for the population are p^2 + 2pq + q^2, which is equal to

Answer:

I think

Explanation:

2 . Hypotonic state

The buffer system which plays the most vital role to prevent changes in the pH of the extracellular fluid caused by metabolic and fixed acids is the bicarbonate buffer.

The bicarbonate buffer-

The bicarbonate buffer system is a system which is responsible for the regulation of homeostasis in the extracellular fluid and in blood. This mechanism regulates the pH of the extracellular fluid by neutralizing the hydrogen ions which are produced in the extracellular fluid. This system generates carbonic acid which is weak and is volatile. This carbonic acid can cleave and dissociate into carbon dioxide which is removed from the body by the lungs.

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Answer:

the answer is 23

Explanation:

23

Explanation:

15+3=18

9+7=16

3 to the 2nd power is 9

18+16+9=43

=23

Plants, algae, and some microorganisms use the process of photosynthesis to convert sunlight into energy.

Water and carbon dioxide are chemically changed into food and oxygen during the process.

The pigment chlorophyll, which gives plants their green hue, is frequently used in the chemical reaction.

Green plants and certain other organisms convert light energy into chemical energy through a process called photosynthesis.

Light energy is gathered and utilised during photosynthesis in green plants to change water, carbon dioxide, and minerals into oxygen- and energy-rich organic molecules.

The main purpose of photosynthesis is to transform solar energy into chemical energy, which is then stored for later use.

This mechanism primarily provides energy to the planet's life systems. By the norms of human engineering, it is not very effective, but it gets the job done.

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Answer: IT HAS AN INSECTIVOROUS HABIT BECAUSE THE TYPE OF SOIL ON WHICH IT LIVES IS DEFICIENT IN NITRATES(NITROGEN) AND THUS TO GET NITROGEN IT FEEDS ON INSECTS. This is because they do not get sufficient nutrients to make food thats why to fulfill their defieciency they eat insects.

Explanation:

The letter N in the most common elements for life CHONP indicates (B) Nitrogen.

Elements are the smallest unit that cannot be broken down further. Each element comprises of specific protons, neutrons and electrons. These elements are essential for living organisms as well. The most common elements inside living body are: CHONP, i.e., Carbon, Hydrogen, Oxygen, Nitrogen and Phosphorus.

Nitrogen is the element in the periodic table with an atomic number 7. It is a very essential element in living organisms because it acts as an important constituent of compounds like nucleic acids, amino acids, proteins, etc. In plants it is a part of chlorophyll.

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(1) as organic molecules in living and dead organisms found in the biosphere

(2) as organic matter in soils

(3) in the lithosphere as fossil fuels and sedimentary rock deposits