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Lerok [7]
3 years ago
6

What base is often found in rna but not in dna

Biology
1 answer:
olga nikolaevna [1]3 years ago
4 0
Uracil is the nitrogenous base found in RNA but not in DNA.
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Why do the body structures of some species support Darwin's theories? because they have similar functions because they are very
scoundrel [369]

Answer:

Because the have similar limbs.

Because they have similar functions.

Explanation:

(because they have similar limbs)

Homology (evolution) describes a structure that has similar function like limbs on dogs and bears (used for walking) and also have a similar arrangement of bones. The fins on a doplhin might be different from the wings on a bat but they reflect a common origin due to their bone composition e.g carpals and radius bones.

(because they have similar functions)

Analogy (evolution) describes a structure with  for example, bird and butterfly wings that have no common ancestor but have the same purpose, in this case flying. They developed independtly as adaptions. This supports natural selection which is a driving force for evolution.

8 0
3 years ago
The Punnett square below shows the results of a cross to produce F2
dezoksy [38]

Answer:

Your answer is 75%

Explanation:

We know that there is a 25% of purple flower... There is four squares, meaning each square is 25% each. White flowers are "W" and purple is "w". There is a 75% of white flowers.

5 0
3 years ago
A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytos
yawa3891 [41]
36 thymine (matches with 36 adenine)
24 guanine (matches with 24 cytosine)
6 0
3 years ago
Read 2 more answers
. Do you think people impact the plants and animals in your environment? Say yes or no, and tell why you think so. Answer to inc
Anit [1.1K]

Answer: Yes.

Explanation:

There is so much pollution of all sorts that they ignore and dont pick trash(I do). The animals they drop off on the side of the road, and leave there, I try to feed some but I can´t even approach some of them. I live in Oklahoma and we are in the middle of a snow storm and I have seen a few stray dogs, it breaks my heart to see how heartless some people are.

7 0
3 years ago
Which cells are considered excitable cells because they are able to produce electrical signals?
jek_recluse [69]
<span>These are excitable and action potential cells, because when they receive a stimulus they activate an action potential, these stimuli are electrical, chemical, mechanical and photonic. The action potential changes rapidly in the membrane potential in response to a stimulus and returns a resting potential. The action potential has several stages, and its main characteristics are that nothing is produced or produced when generated is maintained and propagated, the time of the voltage-dependent channels remain open. The types of the action potential are spike potential, plateau potential, potential and rhythmic potentials.</span>
3 0
4 years ago
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