PLEASE HELP I DIDN'T STUDY

Answer:

Read Below

Explanation:

Wallace is often referred to as the father of modern biogeography. 6. The finger bones inside manatee and whale flippers are evidence that these living species are modified forms of older species.

Oil spills, polluting factories and power plants, raw sewage, toxic dumps, pesticides, freeways, the loss of wilderness and the extinction of wildlife

DNA replication is a truly amazing biological phenomenon. Consider the countless number of times that your cells divide to make you who you are—not just during development, but even now, as a fully mature adult. Then consider that every time a human cell divides and its DNA replicates, it has to copy and transmit the same sequence of 3 billion nucleotides to its daughter cells. Finally, consider the fact that in life (literally), nothing is perfect. While most DNA replicates with fairly high fidelity, mistakes do happen, with polymerase enzymes sometimes inserting the wrong nucleotide or too many or too few nucleotides into a sequence. Fortunately, most of these mistakes are fixed through various DNA repair processes. Repair enzymes recognize structural imperfections between improperly paired nucleotides, cutting out the wrong ones and putting the right ones in their place. But some replication errors make it past these mechanisms, thus becoming permanent mutations. These altered nucleotide sequences can then be passed down from one cellular generation to the next, and if they occur in cells that give rise to gametes, they can even be transmitted to subsequent organismal generations. Moreover, when the genes for the DNA repair enzymes themselves become mutated, mistakes begin accumulating at a much higher rate. In eukaryotes, such mutations can lead to cancer.

Biologists refer to dominant alleles as uppercase letters and recessive alleles as lowercase letters when referring to genotype.

Genetics and evolution define an allele as a variant of the same sequence of nucleotides at the same location on a lengthy DNA molecule.

The variant DNA sequences at a locus are known as alleles, and the chromosomal or genomic location of a gene or any other genetic element is referred to as a locus.

Alleles can be identified using just one capital or lowercase letter, two, three, or more letters, or letter/number combinations. Superscripts, subscripts, or both may be present in alleles.

Alleles that are recessive are denoted by lowercase letters, while dominant alleles are denoted by capital letters.

Thus, this way, the alleles are represented.

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Since tongue rolling ability is determined by a single gene with two separate alleles—the dominant allele, which codes for tongue rolling ability, and the recessive allele, which codes for tongue rolling incapacity—tongue rolling ability is a discontinuous variation.

The hereditary characteristic known as tongue rolling ability controls whether or not a person can roll their tongue into a tube shape. This characteristic is frequently used as an illustration of a straightforward hereditary trait with discontinuous variation since there are only two possible outcomes: either a person rolls their tongue or they do not.

Either a person has the recessive allele, which prevents them from rolling their tongue, or they have the dominant allele, which allows them to roll their tongue. There is no intermediate or in-between trait, and the presence or absence of the dominant allele is a distinct, plainly observable phenotype.

Therefore, the capacity for tongue rolling is an illustration of a discontinuous variation.

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Answer:

C

Explanation:

C states that the surviving species exploite a newly available niche. When an animal migrates is trying to find food or more livable conditions. C is true because migrating usually occurs when animals want to find other new places to fit their circumstances or living conditions.

This is an example that states how the surviving species exploit a newly available niche (Option C).

In biology, the term niche refers to the match between the features of a given species and particular environmental conditions.

In conclusion, this is an example that states how the surviving species exploit a newly available niche (Option C).

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Answer:

8. decisions

9. studied

Answer:

Gravity is one of those things we take completely for granted. And there are two things about it that we take for granted: the fact that it is always there, and the fact that it never changes. If the Earth's gravity were ever to change significantly, it would have a huge effect on nearly everything because so many things are designed around the current state of gravity.  Before looking at changes in gravity, however, it is helpful to first understand what gravity is. Gravity is an attractive force between any two atoms. Let's say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an infinitesimal attraction between them. It is only when you get a gigantic number of atoms together, as in the case of the planet Earth, that the force of gravitational attraction is significant.  The reason why gravity on Earth never changes is that the mass of the Earth never changes. The only way to suddenly change the gravity on Earth would be to change the mass of the planet. A change in mass great enough to result in a change in gravity isn't going to happen anytime soon.

Explanation:

But let's ignore the physics and imagine that, one day, the planet's gravity turned off, and suddenly there was no force of gravity on planet Earth. This would turn out to be a pretty bad day. We depend on gravity to hold so many things down -- cars, people, furniture, pencils and papers on your desk, and so on. Everything not stuck in place would suddenly have no reason to stay down, it would start floating. But it's not just furniture and the like that would start to float. Two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes, and rivers. Without gravity, the air in the atmosphere has no reason to hang around, and it would immediately leap into space. This is the problem the moon has -- the moon doesn't have enough gravity to keep an atmosphere around it, so it's in a near-vacuum. Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space.  In other words, no one would last long if the planet didn't have gravity.  If gravity were to suddenly double, It would be almost as bad, because everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs, support columns, and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them. Trees and plants would have problems. Power lines would have problems. The air pressure would double and that would have a big effect on the weather.  What this answer shows you is just how integral gravity is to our world. We can’t live without it, and we can't afford to have it change. It is one of the true constants in our lives!

Answer:

C

Explanation:

These groups, from largest to smallest are Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

Answer:

LETTER A. AMPLITUDE

Explanation:

Got it right on the test

Answer:

3

Explanation:

There are three domains of life, the Archaea, the Bacteria, and the Eucarya.

Answer:

There are 3 domains

Explanation:

the Archaea, the Eucarya, the Bacteria.

Answer:

false

Explanation:

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Answer:

A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.

Answer:

A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.

Explanation:

Answer:

the answer seems to be A

Explanation:

The answer is ( faramones). for mating purposes..

Answer:

Tectonic plates moving

Explanation:

Answer:

C - Mutations are the only source of genetic variation for asexual reproduction

Mutations are the only source of genetic variation for asexual reproduction.

A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.

Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.

A mutation is never so advantageous in real life that it makes someone a superhero or does anything strange like give them wings. There are numerous explanations for why mutations typically don't have significant effects.

Therefore, Mutations are the only source of genetic variation for asexual reproduction.

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Answer:

The first and second hominids have a more recent common ancestor than the first and third hominids.

Explanation:

The similarity in DNA can definitely reveal us about common ancestry but it does not guarantee that the two species must be mating and reproducing. The best example to support this statement is that humans and chimpanzees  share a common ancestor and both have so much similarity in their DNA. The DNA of humans and chimpanzees is around 99% similar but still humans and chimpanzees cannot mate to produce off springs. Several attempts have been made in past to obtain fertile off springs by mating humans and chimpanzees but so far their mating has not produced any fertile off spring.

Answer: It is verified by testing it. If the data supports the hypothesis, then we consider the hypothesis to be verified and true. If however, the data does not support the hypothesis or refutes it, then the hypothesis is in trouble, and we have to come up with a different hypothesis to explain the observations.

Explanation:

Answer: https://rb.gy/rb1nlh copy that into search browser

Explanation:

Answer:

im not sure but i think  it is  (a thick layer of permafrost ) sorry if im wrong

Explanation:

Answer:

a thin layer of active soil

Explanation:

The tundra’s ground has a thin layer of active soil that thaws during summer. Because of this, plants can grow.

Answer:

(B) Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times.

Explanation:

Hox genes are arranged in clusters and their order on the chromosome is the same as the order in which they are expressed along the body during development.

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Answer:

2nd 1 is because the letters are caps

1st 1 is more common

Explanation:

Answer:

I would say chordates. (Not absolutely sure so double check)

Explanation:

Chordates have a dorsal nerve cord, which is super close to a spinal cord. (Which vertebrates have.)

Answer: Echinoderms

Explanation:

The Echinoderms deuterosomes mouth development and bilateral symmetry in the larval stage lead some scientists to believe that they are the closest to vertebrates.