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iogann1982 [59]
2 years ago
8

What is the part of the cell cycle process by which chromosomes in a cell nucleus are separated into two identical sets of chrom

osomes
Biology
1 answer:
Damm [24]2 years ago
3 0

Answer:

Mitotic phase

Explanation:

Cell cycle is composed of interphase and mitotic phase. Interphase is aphase of cell preparation. It is subdivided into:

  • G1 (gap 1 phase)-the cell grows and becomes larger
  • S phase- replication of DNA, duplication of centrosomes
  • G2 (gap 2 phase)-proteins and oranelles are made

Mitotic phase is phase of cell division, chromosomes are separated, daughter cell get identical sets of chromosomes. It is followed by cytokinesis-separation of cytoplasm. Stages of mitosis are:

  • prophase-condensation of chromatin into chromosomes,  the nuclear envelope breaks down, mitotic spindle formation
  • metaphase-the chromosmes line up (metaphase plate)
  • anaphase-the siste chromatides move toward opposite cell poles
  • telophase-the nuclear envelope forms again, cell division is almost complete
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An animal that is endothermic and homoeothermic A. uses metabolic energy to regulate its body temperature and maintains a relati
rusak2 [61]

Answer: The correct option is A (uses metabolic energy to regulate its body temperature and maintains a relatively constant body temperature).

Explanation:

HOMOEOTHERMIC animals are also called endothermic animals. They are the warm blooded animals which uses heat energy generated metabolically to regulate and maintain a relatively constant body temperature. Examples of animals that are endothermic include the birds and mammals.

The temperature which they maintain is deep inside the body and not the skin temperature.

Also the temperature of a body is affected by the heat it gains and losses. The body gains heat mainly:

--> by absorbing it from its surroundings

--> from the heat released during the catabolic reaction that occur all the time in the body cells.

--> by conduction, convection and radiation from the surface of the body

--> through evaporation, especially of sweat and

--> in the air that is exhaled and urine that leaves the body.

Under normal circumstances, the heat the body gains is balanced by the heat it loses. A RISE in body temperature stimulates the following processes to get rid of excess body heat:

--> A decrease in metabolic rate: the body slows down its activities to decrease the metabolic rate. This reduces the heat released by metabolic reactions, hence minimizing heat production within the body.

A FALL in body temperature stimulates the following processes to produce and conserve heat:

--> increasing metabolic rate: The body increases its metabolic rate, especially that of the liver, to produce more heat

7 0
2 years ago
Would the liver cells that develop from the mutated cell have the same mutation
Anettt [7]
Yes because why a cell goes through mitosis the DNA is an exact replica, there forever having the same mutations
3 0
2 years ago
The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two d
Fofino [41]

Answer:

<h2>Interphase : divided into three phases, i) G1 phase, ii) S phase and iii) G2 phase.</h2><h2>Mitotic phase: i) prophase, ii) metaphase, iii) anaphase and v) telophase.</h2>

Explanation:

interphase : divided into three phases, i) G1 phase, ii) S phase and iii) G2 phase.

G1 phase: cell decide whether to divide or not and prepare itself for replication of DNA and arrange replication machinery.  otherwise it goes to G 0 phase.

S phase: DNA replication occurs in this phase.

G2 phase: cell duplicates all their contents and prepares for mitotic phase.

Mitotic phase:

i) prophase- chromosome condensation occurs,

ii) metaphase - chromosome arranges in meta-plate and spindle binds to each chromosomes  at centromere.

iii) anaphase- chromosome separates from sister chromatids.

iv) telophase- chromosome moves to each ends and formation of nuclear membrane begins.

cytokinesis:  there is division of cytoplasm and forming two daughter cells.

8 0
3 years ago
What is the cisterna chyli
lana [24]

Answer:

the cisterna chyli is the dilated origin of the thoracic duct, which receives the right and left lumber lymphatic trunks and the intestinal lymphatic trunk.

7 0
2 years ago
Which statement best describes how an Alaskan spruce reacts to fire A.resistance B.resilient C.tolerant D.pioneer
agasfer [191]
The correct option is RESILIENT.
The Alaskan forest usually undergo fire incident every year in order to enhance nutrient cycling of the ecosystem. Alaskan spruce is one of the plant find in the Alaskan forests and it is a very resilient plant, in that, when it is destroy by fire incident, it quickly grow back.
7 0
3 years ago
Read 2 more answers
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