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Darya [45]
3 years ago
8

How does artificial selection provide evidence that species can change over time?

Biology
1 answer:
zalisa [80]3 years ago
8 0

Answer:

They can change over time because when you combine two different species together they can turn into a new and different specie. This shows that artificial selection can provide evidence that species can change over time.

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kirza4 [7]

Answer:

list 3 limiting factors How can it limit a population?

Explanation:

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Some kinds of data can be summarized in an illustration like the one below. Assume that the plants that are shown in the illustr
SCORPION-xisa [38]
According to a source. The answer is: <span> <u>As elevation increases, plant height decreases</u></span><span>
This relationship is said to be negatively linear.

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3 years ago
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What is a reactant ?
pochemuha

Answer:

Explanation:

A reactant is a substance that take part or begin a chemical reaction and it is consumed during the reaction to form products. Reactant is on the left of the reaction.

For examples during photosynthesis, the reactants are carbondioxide, water and sunlight that give the product glucose and oxygen.

Carbondioxide, water and sunlight start the reaction and are consumed to produce glucose and oxygen.

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Match the key terms and concepts of the immune system with their descriptions. ResetHelp Dendritic cellsDendritic cells Innate i
liubo4ka [24]

The question is incomplete as it does not have the options to which the provided options must be matched and the options are:

a. Includes cilia, mucous membranes, dendritic cells

b. Immunological response brought about by antibody production

c. Immunological response that kills infected host cells

d. Use(s) BCRs to recognize epitope. First step in clonal selection

e. Phagocytes that engulf anything foreign. Eventually display epitope to helper T cells using MHC I or II

f. Lymphocytes that activate B cells and CTLs

g. Differentiated B cells that are stored in lymph nodes to provide protection against future infections by the same pathogen

h. Produce and secrete antibodies

i. Kills infected host cells

Answer:

a. Innate Immunity

b. Humoral Immunity

c. Cellular Immunity

d. Immature B cells

e. Dendritic cells

f. Th cells

g. Memory cells

h. Plasma cells

i. Cytotoxic T cells

Explanation:

a. Innate Immunity

- the immunity which is present from birth and provides immunity due to the presence of physical barriers like the production of mucus and the cilia.

b. Humoral Immunity

- the immunity which is provided by the immune cells present in the blood in which the main immune cells are the lymphocytes that produce antibodies

c. Cellular Immunity

- the immune response which provides immunity by killing the infected cell observed in the case of the virus-infected cell which is killed.

d. Immature B cells

- The immature B cell is the cell that matures into the plasma cell and the effector cell and is involved in the clonal selection

e. Dendritic cells

- the antigen-presenting cell which moves in the blood and tissues and when interact with an antigen kills the antigen and displays its part through MHC I and II.  

f. Th cells-

T helper cells are the T- lymphocytes that interact with the antigen and activates the B-lymphocyte activation and T cell activation pathway.

g. Memory cells

- the cells which are produced by when a pathogen interacts with the B lymphocytes and the B cells from the memory B cell for future recognition of the antigen

h. Plasma cells

- The cells on antigen interaction start producing the antibodies.

i. Cytotoxic T cells-

the T lymphocytes which are involved in cellular immunity.

6 0
4 years ago
Each somatic cell in an individual with down syndrome contains _____ chromosomes.
jeyben [28]
47 chromosomes. 46 is balanced, 45 is too few (the baby would be stillborn), and 48 is too many. 47, the baby will survive, but will have Down syndrome.
5 0
3 years ago
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