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aleksandrvk [35]
2 years ago
5

Help i’m doing a quiz right now.

Biology
1 answer:
fenix001 [56]2 years ago
7 0
C is the answer hopefully it is
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What is population density? answers are A. the number of organisms of a species
Harlamova29_29 [7]

Answer: Option C.

Population density is the total number of organisms within a fixed area.

Explanation:

Population density is the total number of organisms per unit area. Population density is calculated by dividing the number of organisms by the unit area either in square kilometers, squaremeters, square miles.

Population density =number of organisms ÷ unit of land area.

5 0
2 years ago
What structures are present in plant and animals cells but not in bacterial cell
tatiyna

Answer:

organelles such as nuclei, mitochondria or chloroplast

6 0
2 years ago
The fatty tissue surrounding the kidneys is important because it ________. A. is necessary as a barrier between the adrenal glan
satela [25.4K]

Answer:

D. stabilizes the position of the kidneys by holding them in their normal position

Explanation:

Adipose tissue is a type of connective tissue and is therefore called by some adipose connective tissue. As we saw in the article “Connective Tissue Cells”, adipose tissue is made up of adipose cells, also called adipocytes. Fat tissue specializes in fat storage and is found well below the skin.

Some of our internal organs like kidneys and heart have a layer of adipose tissue lining them. This layer of fat around the organs gives them greater protection against mechanical shock. In addition, in the kidneys, adipose tissue fills the voids between other tissues and helps keep these organs in their normal positions.

4 0
3 years ago
Allergens differ from antigens because ________. Allergens differ from antigens because ________. allergens do not involve the l
Vera_Pavlovna [14]

Answer:

Allergens differ from antigens because *they do no stimulate the immune system resulting in the production of leukocytes rather than the stmulate the IgE antibodies*

Explanation:

Allergen and antigen are both foreign substances that can cause certain disorders to animals, but there is some difference between them in terms of their nature and the diseases caused by them. An allergen is a nonparasitic foreign substance that can cause certain immune reactions in the body when it enters the body.  Whereas, an antigen is a foreign substance that can trigger the immune system to produce a specific immune response. This immune response leads to produce antibodies that can neutralize or destroy the foreign substances that entered the body.

Allergens can produce Systemic Allergic Response. Allergens stimulate the IgE antibodies by binding to them on the mast cells and causing the mast cells to rupture and release histamine, serotonin, and heparin, initiating inflammatory response.

4 0
3 years ago
Read 2 more answers
In the 1940s, proteins were thought to be the more likely molecules to house genetic information. what was the primary reason th
dem82 [27]
DNA was found to contain only four different chemical building blocks. 
4 0
3 years ago
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