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Mama L [17]
4 years ago
15

An evolutionary biologist makes decisions about whether to consider three different populations of damselflies as separate speci

es, based on observations of the individuals with which these damselflies will mate. All combinations of these populations are able to mate with one another and all combinations produced offspring. This biologist is most likely employing _______ species concept.
Biology
1 answer:
kipiarov [429]4 years ago
7 0

Answer:

Biological

Explanation:

The biological species concept differentiates one species from the others on the basis of reproductive isolation. It assumes that the two organisms that belong to different species can not interbreed to produce a viable and fertile progeny. On the other hand, the members of the same species can reproduce with each other to produce progeny. In the given example, the populations of damselflies are observed for their reproductive behavior. Since the flies of all the populations are able to breed with each other, they belong to the same biological species.

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During the _____ month the eyes, ears, nose, jaw and neck form along with the arms, legs, fingers, and toes.
Rudiy27

Answer:

During the 3rd month the eyes, ears, nose, jaw and neck form along with the arms, legs, fingers, and toes.

Explanation:

3 0
2 years ago
Think about the DNA coding sequence of a gene. If an A were swapped for a T, what kind of mutation could it cause and why?
sleet_krkn [62]

Answer:

The answer is D.

Explanation:

The given situation in the question where an Adenine nucleotide is swapped for a Thymine nucleotide, which as stated are complimentary of each other just like guanine and cytosine, can cause all three types of mutations, frameshift nonsense, frameshift missense and silent because the situation is not specific to either of them. There is no information whether the change resulted in a change in the amino acid structures or not. In this case the best answer is D.

I hope this answer helps.

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4 years ago
Carbon dioxide is released when which of the following phenomena occur? nitrogen fixation decomposition photosynthesis burning f
lisov135 [29]
<span>photosynthesis burning fossil fuels</span>
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3 years ago
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deff fn [24]
The answer is a carnivore
3 0
3 years ago
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Plasma membrane of a skeletal muscle fiber - _________Extension of the sarcolemma that dives into the muscle fiber and surrounds
Tpy6a [65]

Answer:

1. Sarcolemma

2. T-Tubule

3. Sarcoplasmic reticulum

4. Terminal Cisternae

5. Myofibrils

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7.Thick filament

8. Thin filament

Explanation:

These are all parts of the skeletal muscle and they are all involved in the contraction of your muslces.

The sacrolemma is also known as the myolemma. It is a specialized plasma membrane of the skeletal muscle cell. It is an excitable membrane that shares similarities to the cell membrane of a neuron cell.

The T-tubule extends from the sarcolemma to the sarcoplasmic reticulum (SR). This is the smooth endoplasmic reticulum of the muscle cell. When the sarcolemma gets excited, it triggers the SR to release the calcium ions stored in it. The release of Calcium ions triggers the contraction of myofilaments.

There are two types of myofilaments, the thick myofilament and the thin myofilament. These myofilaments contain contractile proteins, actin and myosin. Thick myofilaments contain myosin where one thick myofilament contains 300 myosin molecules. Thin myofilaments contain contractile and regulatory proteins. These myofilamens make up myofibrils.  

6 0
3 years ago
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