Answer:
A is called Prophase
B is called Anaphase
C is called Metaphase
D is called Telophase
Explanation:
These can get confusing but I'll explain it for you.
The first stage of <u>mitosis</u> is Prophase.
- In this stage the chromosomes become visible and the centrioles separate and move to opposite poles of the cell.
The second stage of <u>mitosis </u>is Metaphase.
- In this stage the chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere.
The third stage of <u>mitosis</u> is Anaphase.
- In this stage the sister chromatids separate into individual chromosomes and are pulled apart.
The fourth and last stage of <u>mitosis</u> is Telophase.
- During this stage the chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear.
The process that follows the last stage of mitosis is called <u>Cytokinesis</u>.
- With two complete copies of the DNA now in two different regions of one cell, the cell membrane will pinch and divide the cytoplasm in half. The result is two individual cells that are identical to the original cell. Each of the two new cells have a complete copy of the DNA and contain all of the organelles that the original cell had.
Hopefully, this eases the problem for you and you understand it better.
Also, this image might help:
Let me know if you any other questions about this.
Good luck:)
Answer: An ovarian follicle is a roughly spheroid cellular aggregation set found in the ovaries. It secretes hormones that influence stages of the menstrual cycle. Women begin puberty with about 400,000 follicles, each with the potential to release an egg cell (ovum) at ovulation for fertilization.
Explanation:
It’s B warm water in South America
The levels of organization in an organism may be broken down, from simplest to most complex, as:
1. Cell
2. Tissue
3. Organ
4. Organ system
5. Organism
A cell is the basic building of life and almost all cells in an organism's body are far more similar than they are different in both structure and function. Next are the tissues, which are groups of cells combined to carry out a special task. These tissues combine to form an organ, which a large part of the body that partakes in an important task, such as the heart pumping blood. Then is the organ system, which may contain multiple organs all working in conjunction to achieve a change in the organism's body. Finally, the organ systems combine and form the organism. The degree of complexity therefore increases.
I'm not sure if I will answer the question you asked, as I many have interpreted it incorrectly. In natural selection, there must be variance in the gene pool, the total frequency of alleles in a population. Now, one of the organisms may have a gene that somehow helps them survive from the selective force much better compared to the others. If this does happen, over time the gene pool will narrow down to become just the genes of that organism that survived better in the first place because the rest would be taken care of by the selective force. So, the alleles and trait come from the first organisms that had the advantage over the others of its species.
