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3 years ago

Which of these changes in the food web would cause a decrease in the population of bald eagles

Biology

1 answer:

bogdanovich [222]3 years ago

6 0

The correct answer is C. A decrease in the population of sea ducks

Explanation:

Food webs are diagrams that represent the relationship of organisms in an ecosystem by showing feeding or predatory relationships. This means food webs show which organisms eats another organism. In the case of the food web presented, this shows bald eagles fed on sea ducks and large piscivorous fish, this implies for survival bald eagles need from these two organisms. In this context, a decrease in the population of sea ducks (option C) would cause a decrease in the population of eagles because fewer sea ducks imply less food for eagles, and therefore fewer resources to survive.

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In a complement-dependent cytotoxicity assay, lymphocytes were incubated in the presence of antibody of known HLA specificity. C

Alisiya [41]

Answer:

Option A, The lymphocytes express antigens specific for the antibodies in the assay

Explanation:

The options for the question are

a) The lymphocytes express antigens specific for the antibodies in the assay

b) The lymphocytes do not have antigens specific for the antibodies in the assay

c) This is not a valid method for identifying HLA agents.

Solution -

The aim of conducting this assay is to use the ability of the microlymphocytotoxicity assay (CdL) to detect the antibodies specific to the antigens based on the complement dependent assay.

The B and T lymphocytes are tested at both warm and cold temperatures and then the result obtained is compared with other non –complement based test results. HLA-ABC alloantibodies are weak in reactivity and specific to B cell hence they can be identified only through the CdL assay.

Hence, option A is correct

4 0

3 years ago

Onion contain cells just like humans do true or false

Oliga [24]

Answer:

True

Explanation:

All living things contain cells. Both humans and onions are living things.

3 0

3 years ago

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A student was observing slides of cell division. In one of the slides, he noticed loosely coiled chromatin depicting DNA duplica

Dominik [7]

It would be "A. S phase". I think so.

6 0

3 years ago

Several lines of evidence suggest that Mars once was habitable, and the Panspermia hypothesis states that life originated on Ear

alexandr402 [8]

Answer:

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Explanation:

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