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3 years ago

Identify the stages of mitosis .

Biology

1 answer:

Alexxandr [17]3 years ago

3 0

Mitosis has five different stages: interphase, prophase, metaphase, anaphase and telophase. The process of cell division is only complete after cytokinesis, which takes place during anaphase and telophase. Each stage of mitosis is necessary for cell replication and division.

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In what stage were most of the onion root tip cells? based on what you know about cell cycle division, what does this imply abou

Lynna [10]

The correct answer is interphase.

Root tip cells are known cells that have a rapid division to allow the growth and lengthening of the roots

The life of the somatic cell is divided into two major phases: interphase and mitosis.

The interphase is the longest phase in a eukaryotic cell, it is in this phase that the cell must prepare for division, and this by transcribing necessary proteins, replicate and repair the DNA in case of lesions. .

Mitosis is relatively fast, it represents less than a quarter of the life of the cell.

8 0

3 years ago

Read 2 more answers

Question 1:

SpyIntel [72]

Hello. You forgot to enter the necessary data for this question to be answered. The data are shown in the figure attached below:

Answer:

Red-capped Robin is the group of Robins that share a more recent common ancestor with the Norfolk Island robins.

Explanation:

Red-capped Robin is the group of Robins that share a more recent common ancestor with the Norfolk Island robins, this can be seen by the degree of genetic similarity between these two species, since the Red-capped Robin has 98.2% of genetic similarity .

When two species have the same common ancestor, these species have great genetic similarity and the more recent this ancestry is, the greater the genetic similarity between the species.

3 0

3 years ago

Beginning with the flow phase, arrange the biochemical processes in the order in which they occur during the menstrual cycle.

Svet_ta [14]

The right order are :

6. High progesterone levels ...

4. The endometrium lining breaks down ...

1. FSH and LH stimulates ...

5. Rising estrogen levels suppress FSH production ...

3. A spike in LH causes follicle to rupture.

2. A breakdown of corpus luteum ...

The menstrual cycle is divided into 2 phases:

Phase 1: the estrogenic or follicular phase (14 days)

The ovarian follicules each house an egg. They continue to grow thanks to the hormone FSH (follicle stimulating hormone) secreted by the pituitary gland, a gland at the base of the brain. But in the end, only one follicle matures. The others will then disappear.

The ovaries produce estrogen that will allow the endometrium to thicken to accommodate an egg in case of fertilization.

The estrogen level gradually increases in the blood and triggers the sudden release of luteinizing hormone (LH), which has been secreted and stored by the pituitary gland. Under the action of this hormone, the dominant follicle breaks and delivers an egg: it is the moment of ovulation.

The oocyte initiates the descent of the fallopian tube to the uterus for 3 or 4 days. It is fecundable for about 24 hours. Then, and if he has not met sperm, he degenerates.

Phase 2: the progesterone or luteal phase

The second phase of the menstrual cycle begins after ovulation and lasts 2 weeks.

Under the action of the LH, the follicle that released the egg turns into a yellow body. This temporary cell structure produces estrogen and a large amount of progesterone. This hormone acts on the thickening of the uterine lining, which is enriched with nutrients.

Progesterone production peaks about 8 days after ovulation and then declines as the pituitary stops secreting LH. The corpus luteum deteriorates around the 23rd day, until the 28th day. This also causes a drop in estrogen levels.

This hormonal variation influences the state of the endometrium. As it does not receive so much blood and oxygen, the upper wall of the mucosa gradually degenerates and is evacuated by the vagina in the form of bleeding, what is called menstruations.

5 0

4 years ago

How many positive particles does zinc have? *

GREYUIT [131]

Answer:

30 electrons

30 protons

34 neutrons

5 0

2 years ago

Which form of government structure do states use?

Contact [7]

I think the correct answer from the choices listed above is option A. The government structure that states use is the federal system. It is the government of the fifty states that constitutes the United States. It has three branches - legislative, executive, and judicial.

8 0

3 years ago