Biology, 09.03.2020 23:55 153536

BIOLOGY! 20 POINTS! ANSWER ASAP! What does the red node represent? (CHOOSE ALL THAT APPLY) (see photo)

1.)The common ancestor of species B and C

2.)The common ancestor of species A, B, and C
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3.)The common ancestor of species A and B

4.)A speciation event

BIOLOGY! 20 POINTS! ANSWER ASAP! What does the red node represent? (CHOOSE ALL THAT APPLY) (see phot

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Answer from: genyjoannerubiera

The red node represent a speciation event and the common ancestor of the species B and C i.e option 1 and 4 are the right answers.

Explanation:

Speciation is an event that leads to splitting in a lineage producing two or more species. The speciation would lead to different species as they no longer can interbreed and produce viable offspring.

The node shows that the two species originated from the same root but undergone speciation to be two different species.

The speciation takes place due to genetic drift, selective breeding and mutations in the population which lead to Natural selection.

In the given picture the root with trait one got modified into trait 4 and 5 via trait 3. This means that due to mutation the genes have changed and evolved for better functions and thus they survived via Natural Selection.

The figure represents diverge population as two new species are there and thus is Allopatric Speciation and have common ancestors.

Answer from: Quest

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

Answer from: Quest

c. movement because i took the test and it lets me review my answers

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BIOLOGY! 20 POINTS! ANSWER ASAP! What does the red node represent? (CHOOSE ALL THAT APPLY) (see phot...

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