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3 years ago

Using a clock, scientists are able to estimate the amount of time that two species have been evolving independently.

Biology

2 answers:

inn [45]3 years ago

3 0

Answer:

Whats the question??

Explanation:

Need a question

Shkiper50 [21]3 years ago

3 0

Answer:

The answer is a molecular clock

Explanation:

edge 2020

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Help pls hurry up .................

wlad13 [49]

Answer:

A(the first one)

Explanation:

Homeostasis maintains the constant internal conditions in an organism. It is important because cells function best with a limited range of conditions. ... All living things have body parts with different functions that help them survive.

8 0

3 years ago

In a particular variety of corn, kernel corn is controlled by a single gene with two alleles. the dominant allele results in pur

PIT_PIT [208]

The frequency of recessive yellow beans resulting from a cross between two heterozygous plants is 25%.

<h3>What are recessive alleles?</h3>

Recessive alleles differ from dominant alleles in not being able to express themselves in heterozygotes. These alleles are only expressed in the phenotype if they are present in pairs, that is, they must be in homozygosity.

With this information, we can conclude that the frequency of recessive yellow beans resulting from a cross between two heterozygous plants is 25%.

Learn more about Recessive alleles in brainly.com/question/18075358

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4 0

2 years ago

A(n) _______ is a long period of time with little or no rain.

34kurt

Drought

that is the answer, I'm pretty sure

3 0

4 years ago

True-breeding flies with singed bristles (s) and normal wings (L) were crossed to true-breeding flies with normal bristles (S) a

mina [271]

Answer:

The correct answer is -

Possible F2 offspring genotypes and phenotypes:

SsLl: normal bristle, normal wing

Ssll: normal bristle, vestigial wing

ssLl: singed bristle, normal wing

ssll: singed bristle, vestigial wing

Explanation:

In this case, the genes 's' and 'L' and genes 'S' and 'l' are linked, they will be passed on to the gamete together.

The cross would be as follows:

F1:

Parents: singed bristles and normal wings x normal bristles and vestigial wings

Genotype: ssLL SSll

Gametes: sL Sl

F1: SsLl ( normal bristles and normal wings )

For F2,

Parents: normal bristles and normal wings x singed bristles and vestigial wings

Genotypes: SsLl ssll

Gametes: SL, Sl, sL, sl

Cross:

SL Sl sL sl

sl SsLl Ssll ssLl ssll

Thus the possible offspring will have -

SsLl: normal bristle, normal wing

Ssll: normal bristle, vestigial wing

ssLl: singed bristle, normal wing

ssll: singed bristle, vestigial wing

4 0

3 years ago

The key to the changes in protein conformation that drive ATP synthesis is: a. Rotation of the shaft protein driven by the proto

Diano4ka-milaya [45]

Answer:

a. Rotation of the shaft protein driven by the proton gradient

Explanation:

The F1 portion of ATP synthase is hydrophilic and responsible for hydrolyzing ATP. The F1 unit protrudes into the mitochondrial matrix space. ... γ subunit allows β to go through conformational changes (i.e., closed, half open, and open states) that allow for ATP to be bound and released once synthesized.

The proton gradient produced by proton pumping during the electron transport chain is used to synthesize ATP. Protons flow down their concentration gradient into the matrix through the membrane protein ATP synthase, causing it to spin (like a water wheel) and catalyze conversion of ADP to ATP.

3 0

3 years ago