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rusak2 [61]
3 years ago
6

Need help with this question ASAP:

Biology
1 answer:
tatyana61 [14]3 years ago
5 0

Answer:

I am positive the answer is C because I used to study the exact same lesson.

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23. Fossils are rare because:
Dmitry [639]
A is the answer to this question
4 0
4 years ago
The client who has recently undergone treatment with chemotherapy and radiation has a reduction in all three hematopoietic cell
ikadub [295]

This is known as Pancytopenia.

The three hematopoietic cell lines lead to the formation of red blood cells, white blood cells and platelets. All these cells play important roles in various body functions.

Pancytopenia is a condition in which the quantity of red blood cells, white blood cells and platelets decrease in the body of a person. Chemotherapy and radiation are serious procedures that along with killing the cancerous cells also destroy many of the normal cells of the body. Hence, chemotherapy and radiation leads to decrease in all the three hematopoietic cell lines of the body causing a condition referred to as Pancytopenia.

To learn more about pancytopenia, click here:

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4 0
2 years ago
Classify each cell as haploid or diploid. 1. microspore:
Alex17521 [72]

Answer:

microspore: haploid

2. first polar body: haploid

3. spermatid: haploid

4. ovum: haploid

5. secondary oocyte: haploid

6. primary spermatocyte: diploid

7. microsporocyte: diploid

8. oogonium: diploid

9. megaspore: haploid

10. spermatogonium: diploid

Your answer

Explanation:

1. Microspore is a haploid spore produced by mostly ferns. They give rise to male gametophytes, which in turn produces sperm cell.

2. Polar body is one of the haploid cells that forms during the process of oogenesis (gametogenesis), specifically when the primary oocyte undergoes an unequal division.

3. A spermatid is an haploid cell that arises from the second meiotic division of the spermatogonia.

4. The ovum is the female gamete of most sexual reproducing organisms. It is also called the EGG CELL. It is haploid.

5. Secondary oocyte are haploid cells that results from the meiotic division of the primary oocyte.

6. Primary oocyte is the diploid cell that starts the meiotic division during oogenesis. It arises from the mitotic division of the oogonium.

7. The microsporocyte is the diploid cell that undergoes meiotic division to produce microspores in ferns and other land plants.

8. Oogonium are the diploid stem cells that initially starts the oogenesis process. It undergoes mitosis to form the primary oocyte, which divides meiotically till the ovum is formed.

9. Megaspore is a haploid spore that gives rise/germinates to the female gametophyte in ferns. The female gametophyte produces the haploid eggs.

10. Spermatogonium are undifferentiated stem cells that produces the sperm cells in males via the process of spermatogenesis. The spermatogonia is diploid in nature

5 0
3 years ago
A species of bird was well established on an island. Its beak was well-structured for cracking large nuts. After a few years, so
Nataly_w [17]
The birds adapted to the changes. Since the large nuts were no longer as abundant because of the large birds, the small birds were left with the smaller nuts. Their larger beaks lost their use since the small nuts did not require such well-structured beaks, so the birds started to develop smaller beaks.
8 0
3 years ago
From deep (innermost) to superficial (outermost), the layers of the organs of the alimentary canal are? 1) mucosa; 2) muscularis
horsena [70]

The correct order of the layers of the organs of the alimentary canal is mucosa, submucosa, muscularis externa, and serosa. The correct option is B.

<h3>What is alimentary canal?</h3>

The alimentary canal is a long tube of organs that allows food to pass through the body.

It encompasses the esophagus, stomach, and intestines and runs from the mouth to the rectum. The digestive tract of an adult is approximately 30 feet long.

Smooth muscle fibers or cells are long and spindly in shape. Peristalsis is the prime objective of these muscle fibers.

Mucosa, submucosa, muscularis externa, and serosa are the correct layers of the alimentary canal organs.

Thus, the correct option is B.

For more details regarding alimentary canal, visit:

brainly.com/question/9120234

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Your question seems incomplete, the probable options are:

  • A) 3, 2, 4, 1
  • B) 1, 4, 2, 3
  • C) 1, 4, 3, 2
  • D) 1, 2, 4, 3
6 0
2 years ago
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