BIOLOGY HIGH SCHOOL

In which phase of mitosis do chromosomes line up at the middle of the cell?

Answers

Answer 1
Answer: chromosomes align on the middle of the cell during metaphase

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any abiotic or biotic factor in an ecosystem that causes a population's size to slow decrease is a ______ factor.

Answers

Limiting factor.....

Answer:The correct answer is limiting factor

Explanation:

_____________ take up stations in tissues and act as scavengers, devouring pathogens and worn -out cells.A. Natural killer cells
B. Amino acid cells
C. Enteric cells
D. Macrophages

Answers

D. Macrophages


These cells, unlike Neutrophils, tend to go and settle in a tissue and kill pathogens as well as worn out cells. Natural killer cells are used for something similar - they kill cells that have been infected by a pathogen and are displaying the pathogen's antigen on their surface (antigen presentation) - this is how the Killer-T-cells are able to recognise which cells need to be destroyed.

The cell membrane _____. is made of phospholipids is a single layer is embedded with proteins controls the transfer of materials into and out of the cell does not exist in plant cells

Answers

Answer:

Is made of phospholipids

Explanation:

The cellular compartment of all eukaryotes is bounded by a membrane called cell/plasma membrane. The membranes in cells are similar in structure and majorly composed of phospholipids that builds it.

The phospholipid component are arranged in two adjacent layers in biological membranes, hence, called phospholipid bilayer. The phospholipid bilayer is said to be AMPHIPATHIC because it contains two hydrophobic fatty acids and a hydrophilic phosphate head in its structure. This amphipathic nature of the cell membrane confers semi-permeability of substances upon it.
The cell membrane... is made of phospholipids (consist of a lipid bilayer)

Which will most likely result in a negative growth rate in the human population of a country

Answers

Answer:

The death rate is higher than the birth rate. The birth rate is higher than the death rate.

Explanation:

A(n) __________ is created when sperm meets egg and contains all DNA necessary to create a person.a. zygote
b. blastocyst
c. embryo
d. fetus

Answers

Answer : The correct answer for the blank is -

a. zygote.

A zygote can be described as a diploid cell that is produced by the fusion of gametes (from each parent such as egg and sperm). The process of fusion is called fertilization and zygote is also called fertilized ovum/egg.

Zygote undergoes multiple rounds of proliferation (cell division through mitosis) and ultimately differentiates to produce the highly advanced stage, fetus (which is fully developed baby).

Thus, a zygote is formed when sperm meets egg and contains all DNA necessary to create a person.

Hello there,

The answer to your question is:

Zygote

Hope this helps.

To avoid being digested by their host, endoparasites have a thick protective covering called thea. cell wall.
c. protoplasm.
b. cilia.
d. tegument.

Answers

The answer is A.) cell wall
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Hydrogen peroxide is a harmful by-product of normal metabolic activity. In order to prevent damage, hydrogen peroxide must be broken down into water and oxygen quickly. What would speed up the decomposition of hydrogen peroxide? A) a catalyst B) bubbling in oxygen C) decreasing the temperature D) adding more hydrogen peroxide
Upturned Face by Stephen Crane (excerpt) Read the excerpt about two men trying to bury a dead soldier right in the middle of a battle. "Yes," said Lean. The two privates stood waiting, bent over their implements. "I suppose," said Lean, "it would be better if we laid him in ourselves." "Yes," said the adjutant. Then apparently remembering that he had made Lean search the body, he stooped with great fortitude and took hold of the dead officer's clothing. Lean joined him. Both were particular that their fingers should not feel the corpse. They tugged away; the corpse lifted, heaved, toppled, flopped into the grave, and the two officers, straightening, looked again at each other—they were always looking at each other. They sighed with relief. The adjutant said, "I suppose we should—we should say something. Do you know the service, Tim?" "They don't read the service until the grave is filled in," said Lean, pressing his lips to an academic expression. "Don't they?" said the adjutant, shocked that he had made the mistake. "Oh, well," he cried, suddenly, "let us—let us say something—while he can hear us." "All right," said Lean. "Do you know the service?" "I can't remember a line of it," said the adjutant. Lean was extremely dubious. "I can repeat two lines, but—" "Well, do it," said the adjutant. "Go as far as you can. That's better than nothing. And the beasts have got our range exactly." Lean looked at his two men. "Attention," he barked. The privates came to attention with a click, looking much aggrieved. The adjutant lowered his helmet to his knee. Lean, bareheaded, he stood over the grave. The Rostina sharpshooters fired briskly. What are the tone and mood of the passage? A. The tone of the story is serious and the mood is one of anticipation. B. The tone of the story is neutral and the mood is one of desperation. C. The tone of the story is somewhat hopeful and the mood is cheerful. D. The tone of the story is sympathetic and the mood is sorrowful. E. The tone of the story is somewhat humorous and the mood is uneasy.