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densk [106]
4 years ago
10

Which of the following contains stem cells that can produce only their own type of cells?

Biology
2 answers:
katrin [286]4 years ago
8 0

Answer:

2) Adult

Explanation:

Adult stem cells or somatic stem cells produce only their own type of cells. They are undifferentiated cells present throughout the body and are used to regenerate damaged tissues and replenish dying cells. They can generate all the cell types of the organ from which they originated. Some can even regenerate the entire organ.

Common signalling pathways found in adult stem cells are Wnt, Notch and TGFβ. They can be of many types. For example: Hematopoietic stem cells are present in bone marrow and all types of blood cells can originate from them. Intestinal stem cells are present in crypts of Lieberkuhn and can give rise to cells of small and large intestine.

Sonja [21]4 years ago
6 0

Hello, XxBaddiexx!! Your answer would be 2 - Adult because the adult stem cell can renew itself and repair the tissues they are found in, if it is needed. I hope this helps!! Have a great day.

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We say that DNA is complementary. This means that one side complements the other. Since we know the base-pairing rules..... if t
r-ruslan [8.4K]

Answer:

B is correct

Explanation:

This is because in DNA, purines (A and G), pair with pyrimidines (C and T), and  more specifically, adenine pairs with thymine and cytosine pairs with guanine. Per this base pairing, B should be the right answer.

3 0
4 years ago
Scientists once believed that modern-day reptiles were the only living descendants of dinosaurs, which were reptiles. Accumulati
Mrrafil [7]

This is the complete question

Scientists once believed that modern-day reptiles were the only living descendants of dinosaurs, which were reptiles. Accumulating fossil evidence has now suggested that the most recent dinosaurs gave rise to birds, making birds one of the closest living relatives of dinosaurs.

What statement provides the strongest evidence to support the claim that birds evolved from dinosaurs?

A. A fossilized rib cage of the semi-aquatic dinosaur Spinosaurus shows that it had lungs.

B. Fossils of the beaked dinosaur Ankylosaurus show that it had modified scales that produced hard, bony plates.

(C. Fossils of the winged dinosaur Archaeopteryx show that it had modified scales that produced feathers.) c is the right answer

D. A fossilized nest of the herbivorous dinosaur Brachiosaurus shows that it laid external eggs.

The correct answer is option C, that is, fossils of the winged dinosaur Archaeopteryx show that it had modified scales that produced feathers.  

<h3>What is Archaeopteryx?</h3>

Archaeopteryx is considered an intermediate fossil between the dinosaurs and modern birds.

With its amalgamation of reptilian and avian characteristics, it was long considered as the earliest known bird. It was found in 1860 in Germany, it is sometimes also called Urvogel, that is, the German term for a first bird or original bird.  

Thus, The correct answer is option C.

To learn more about Archaeopteryx click here:

brainly.com/question/17059171

#SPJ1

5 0
2 years ago
What process allows scientists to make unlimited amounts of DNA for testing?​
ElenaW [278]

Answer:

DNA cloning allows a copy of any specific part of a DNA or RNA sequence to be selected from the millions of other sequences in a cell and produced in unlimited amounts in pure form.

Hope this helps :)

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Answer:

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6 0
3 years ago
______________ can be used to date fossils in rocks to give an approximate age.
Vikki [24]
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