How and why do cells reproduce

Answers

Answer 1

Answer: Cells reproduce for 3 reasons

-Repair
-Growth
- And to make new kinds of cells

And how they reproduce

Scientists call the process of somatic cell division mitosis. Mitosis has six distinct steps in which the cell organizes and copies the DNA in the nucleus. Once copied, each new cell has its own copy of the DNA. The six steps of mitosis are prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis. Some authorities consider the non-dividing portion of the cell’s lifecycle, known as interphase, to be one of seven steps involved in mitosis; however, interphase cells are not actively dividing. Sex cells, such as sperm or eggs, must divide differently. Sex cells only possess one-half of the DNA that makes up a new animal. That way, when they combine, the resulting organism gets half of its DNA from its mother and half from its father. Because sex cells only want half of the DNA in each cell, they go through a different division process called meiosis. In meiosis, the cells split a second time, which yields four daughter cells rather than two as with mitosis; however, this provides each daughter cell with 23 chromosomes in contrast to the 46 chromosomes in somatic cells.

Related Questions

Some fish and amphibians have _____, which detect electrical fields that help them navigate through dark, murky waters.A. photoreceptorsB. olfactory receptorsC. electroreceptorsD. thermoreceptors
After mitosis in animals, cytokinesis takes place. what happens during cytokinesis?
Which event is likely to trigger succession?
What happens to Earth when it is farthest from the sun?It moves fastest.It stops rotating.It moves slowest.It stops revolving.
Lakes and rivers constitute _______.a.87% of freshwater b.a tiny fraction of Earth’s freshwater c.a majority of Earth’s freshwater d.a majority of water on earth

Recently, some crop plants were genetically modified to be immune to the effects of weed killers. Which of the following should be determined before planting the resistant crop in fields?A: Could the gene for resistance be passed on to the subsequent generations of crops?

B: Could the gene for resistance to weed killers pass naturally from the crop plants to weeds?

C: could the gene for resistance increase the yields of the crop as compared to unmodified varieties?

D: Could the gene for resistance negativity affect the genetic diversity of the crop itself?

Answers

D: Could the gene for resistance negativity affect the genetic diversity of the crop itself?

How is the grouping of stars in a constellation different from the grouping of planets in the solar system?

Answers

Stars in a constellation only appear to be grouped together when viewed from Earth, Planets really are grouped together.

In ovaries, the final products of meiosis areA) haploid cells.
Eliminate
B) diploid cells.
C) triploid cells.
D) polyploid cells.

Answers

Hi There

Answer : A and B

I hope that's help :)

Final answer:

In ovaries, the final products of meiosis are haploid cells, meaning they contain half the number of chromosomes as the parent cell. These cells combine with sperm cells, which are also haploid, to create a diploid cell during fertilization.

Explanation:

In biology, particularly in the process of meiosis in ovaries, the final products are haploid cells. This means they contain half the number of chromosomes as the parent cell. The process of meiosis in the ovaries ultimately results in the creation of egg cells or oocytes, which are haploid in nature and are ready for fertilization by sperm, which are also haploid.

Thus when fertilization occurs, the egg and sperm combine their chromosomes to result in a diploid cell, or zygote, with chromosomes from both parents.

Learn more about Meiosis here:

brainly.com/question/30614059

#SPJ3

Why are the contents of gastric juice so hostile to the exposed duodenal wall?

Answers

The gastric juice contain harsh chemicals which includes pepsin, hydrochloric acid to break down food. Gastric juice contain mucus to neutralize its acidity that can be damaging to the stomach, especially the duodenal wall. Excessive secretion of gastric juice and failure to neutralize it completely can result to ulcers in the duodenal wall.

Distinguish between gradualism and punctuated equilibrium.

Answers

For gradualism changes in species is slow an gradual, occurring in small period changes in the gene pool, whereas for punctuated equilibrium, evolution occurs in spurts of relatively rapid change with long periods of non- change.

Final answer:

Gradualism and punctuated equilibrium are evolutionary theories. Gradualism suggests a slow, constant pace of evolution, whereas punctuated equilibrium involves rapid speciation events after periods of stability.

Explanation:

The theory of gradualism posits that evolution proceeds gradually, with slow and continuous changes taking place over long periods of time. Species progressively mutate and adapt, leading to gradual phenotypic and genetic changes, eventually resulting in some new species over millions of years.

On the other hand, punctuated equilibrium proposes that species experience long periods of stability (equilibrium), punctuated by short, rapid events of speciation. These dramatic events involve a small segment of the population evolving quickly while the rest of the population remains unchanged, leading to a new species.

In summary, gradualism presents a slow, steady pace of evolution, while punctuated equilibrium supports the theory of sudden evolutionary jumps interspersed with periods of little to no evolutionary change.

Learn more about Evolution here:

brainly.com/question/32103283

#SPJ6

These are a pair of organs inside a whale that take in oxygen from the air and allow this oxygen to enter the animal’s blood. These organs are called

Answers

These organs are called lungs

Other Questions

Which is the best characteristic that distinguishes the kingdom Archaebacteria from the kingdom Eubacteria

if mosses and ferns grow in an environment that is dry and where water is limited, wich of the two plants would be the most affected?

The third step in the scientific method is reviewing the literature.Question 10 options: a. True b. False

If you feel pain during weight training, what should you do?Move more quicklyMove more slowlyIncrease weightStop altogether