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3 years ago

Which was the first cell viewed by the light microscope?

Biology

1 answer:

ryzh [129]3 years ago

8 0

cork cells

, when they were observed the person who did it proclaimed they looks like desk cells because cork cells are dead and empty are just rectangles. This is how the name cell was orginated

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What keeps intracellular receptors from binding to dna before a hormone binds to the receptor?.

Gemiola [76]

Answer:

chaperone proteins

Explanation:

The chaperone protein blocks the DNA binding site until a hormone binds at the hormone binding site.

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3 years ago

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VashaNatasha [74]

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6 0

3 years ago

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using the terms homologous and analogous, identify which group of structure provides evidence for a common ancestor. explain

faltersainse [42]

Answer:

Homologous structures.

Explanation:

Homologous structures provide evidence for common ancestry because the organs are similar in position, structure, and evolutionary origin in homologous but different in their function, while on the other hand, the analogous structures indicates that similar pressures on organisms can produce similar adaptations among organisms. so we can say that homologous structure provides evidence for a common ancestor of different organisms.

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3 years ago

A young boy has been found, and police are trying to locate his family. They take a DNA sample from him and begin collecting DNA

GaryK [48]

Answer:

The correct answer would be Y-chromosome analysis.

Y-chromosome analysis is technique used to search the parental line of a boy on his father's side.

Gender of a person is determined by $23^{rd}$ chromosome in humans. XX is present in females and XY is present in males.

Mother always passes X chromosome to her progeny but father passes both X and Y chromosomes. If X is passed from the father then the offspring will be a girl and if Y is passed from the father then the offspring will be the son.

The sons (F₂) of this son (F₁) will also bear the same Y chromosome as that of grand father (P).

Thus, Y chromosome always passes from father to son and hence, Y-chromosome analysis can help in identification of father of this young boy.

3 0

3 years ago

Read 2 more answers

The body’s reaction to a change in the environment is called a response. Please select the best answer from the choices provided

weeeeeb [17]

Answer:

(true)

Explanation: just took the test

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4 years ago