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Leona [35]
3 years ago
5

The first cells to initiate an electrical signal in the heart is the

Biology
1 answer:
Lady_Fox [76]3 years ago
3 0

Answer:

Answer is Sinoatrial node, SA.

Explanation:

The sinoatrial node, SA, is known to be a group of cells which are found at the top of the heart.

The electrical signal that is initiated by the sinoatrial node bring about or stimulates the atria and then the ventricle of the heart.

It should be noted that, the sinoatrial node are regarded as the pacemaker cells.

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rosijanka [135]

It is true. In drosophila, distinct sets of maternal impact gene products must accumulate in the proper region of the embryo to ensure proper anteroposterior and dorsoventral development.

<h3>What makes Drosophila unique?</h3>

The use of Drosophila over vertebrate models has many technological advantages;

  • they are simple and affordable to culture in lab settings,
  • have a significantly shorter life cycle,
  • produce huge numbers of externally deposited embryos
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<h3>Why is Drosophila referred to be the genetic Cinderella?</h3>
  • Drosophila, which means "dew loving," is derived from the Greek word drósos.
  • Fruit flies, or Drosophila melanogaster, are referred to as the genetic Cinderella.
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4 0
1 year ago
What defines a group of interbreeding individuals that are reproductively isolated from other such groups?
Vika [28.1K]

Answer:

Biological species.

Explanation:

Various concept like morphology species concept, ecological species concept was introduced by the scientists to explain the biological species. The biological species concept is accepted today.

The biological species concept explains that the group of interbreeding population that has the ability to reproductively isolated from the other such group.

Thus, the correct answer is option (c).

4 0
3 years ago
The ovaries and testes are examples of __
Debora [2.8K]
Spermatogonia is my answer
4 0
3 years ago
Read 2 more answers
Question 3
WARRIOR [948]

He was the first to provide an explanation of evolution supported by evidence.

5 0
3 years ago
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If there are 46 chromosomes in a human cell, each with an average of of 5cm uncoiled length, estimate the length of DNA containe
Vikki [24]

Answer:

length would be 230 uncoiled

5 0
2 years ago
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