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telo118 [61]
3 years ago
12

How do viruses reproduce?

Biology
2 answers:
Mrrafil [7]3 years ago
8 0
Idk how did you get produced? ((It's a joke I'm sorry )) all I know is they can only be changed or obtained but not lost.
FinnZ [79.3K]3 years ago
5 0
<span>the virus attaches itself to a specific host cell (the cell in which it will reproduce) the virus injects its genetic material into the host cell. the host cell uses the genetic material to make new viruses. the host cell splits open, releasing the viruses.</span>
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Some species of penguins, such as chinstrap penguins, depend on open water for their survival. Other species of penguins, such a
prisoha [69]
Some species of penguins, such as chinstrap penguins, depend on open water for their survival. Other species of penguins, such as Adélie penguins, depend on ice. Over the last 20 years, the population size of chinstrap penguins has increased, and the population size of Adélie penguins has decreased. An increase in global air and water temperatures likely caused <span>these changes in population size.</span>
3 0
3 years ago
Read 2 more answers
Read each of the sentences that describe a phase of meiosis. Place each sentence into the correct box.
Allushta [10]

Answer:

prophase 1(Homologous chromosomes pair to form a tetrad.

prophase 1(Crossing-over may occur between the non-sister chromatids).

Metaphase 1 (Homologous chromosomes line up at the center of the cell.)

Anaphase 1 (Homologous pairs separate and move towards opposite ends of the cell)

Telophase 1 (A nuclear membrane forms and cytokinesis follows).

Metaphase 2 ( The haploid number of duplicated chromosomes line up at the metaphase plate.

Anaphase 2 (Sister chromatids separate and become daughter chromosomes that move to the poles)

Meiosis 2: Four haploid daughter cells are formed that are not genetically identical.

Explanation:

Meiosis is a type of cell division that gives rise to gametes ( offsprings). This type of cell division occurs only in the reproductive organs. A diploid cell has two sets of chromosomes: one from the female parent and the other one from the male parent. When the diploid cell undergoes meiosis, the chromosome replicate once and the nucleus and cell duplicate twice giving rise to four haploid gamete cells.

The phases of meiosis occurs in two step divisions. Homologous pairs separate during the first round cell division which occurs in MEIOSIS 1 while the sister chromatids separate in the second nuclear division called MEIOSIS 2.

In each round of division, cells go through four stages: PROPHASE, METAPHASE, ANAPHASE, and TELOPHASE. The specific events that occur in these stages are already listed in the above answer.

Generally, at the start of meiosis, each member of a homologous pair of chromosomes, which are made up of two chromatids, moves to lie side by side. While they are thus paired, genetic material is exchanged between the chromatids. This is known as CROSSING OVER.

When the nucleus divides for the first time, the chromosomes in a given pair( not the chromatids) separate and move to opposite ends of the cell. This results in only half the number of chromosomes going to each daughter cell.

During the second nuclear division, the chromatids separate and move to opposite ends of each daughter cell giving rise to four gamete cells, each with a haploid number of chromosomes.

7 0
2 years ago
Read 2 more answers
Which is a cell that contains genetic information from both the mother and the father?
SVETLANKA909090 [29]

Answer:

the zygote, because it is formed by the sperm and egg cells of both sex

5 0
2 years ago
Carlos avoids _____on the ingredient list of packaged foods because he has celiac disease.
mamaluj [8]

Answer:

wheat, rye, and barley

Explanation:

  • Celiac disease is a type of an immune disorder in which a person is unable to eat food that contains gluten because it can lead to the destruction of their small intestine.
  • Gluten is a type of protein that is found in several ingredients such as wheat, rye, and barley.
  • Consumption of gluten can lead to the development of inflammation in the small intestine which after a certain time can lead to its destruction.
  • The various symptoms associated with the disease include bloating, diarrhea, anemia, etc.
  • Since Carlos has celiac disease he has to avoid wheat, rye, and barley.
5 0
3 years ago
Which of the following are possible treatments for multiple sclerosis? There may be more than one correct answer. Which of the f
fenix001 [56]

Answer:

--Block immune cells from crossing the blood brain barrier.

--Stimulate the regeneration of myelin.

Explanation:

Multiple sclerosis or shortly known as MS is an unpredictable disease caused in the humans. Multiple sclerosis affects the central nervous system of our brain which causes the disruption in the flow of the information within our brain, and between our brain and the body.

It is a very rare disease.

The symptoms of MS may vary and includes double vision, weakness, fatigue, impaired coordination, pain, etc. Though there is no permanent cure for MS but scientist and doctors around the world suggest that by blocking the immune cells and stopping them from crossing our blood brain barrier can prevent this disease.

Multiple sclerosis can also be prevented by stimulating the myelin to regenerate.

8 0
3 years ago
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