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jok3333 [9.3K]
3 years ago
12

Why do amoebas change shape?

Biology
1 answer:
Nuetrik [128]3 years ago
5 0
It keeps changing its shape because amoeba move around with pseudopodia (false feet) for taking food and to adapt to their environment.
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A nurse is discussing the care of a patient with cancer with a nursing student. The patient is about to begin chemotherapy with
dalvyx [7]

Answer:

a."Alkylating agents are toxic to tissues that have rapidly dividing cells."

Explanation:

In the given example the patient is about to begin chemotherapy with a bifunctional alkylating agent.

when the two dna strands are cross linked they will not separate for dna replication which will halt the cell division process so rapidly dividing cells will stop dividing and die

Moreover,Chemotherapeutic agents, also known as antineoplastic agents, are used to prevent the growth of fast-growing cells, usually in the sense of malignancy, directly or indirectly.

Therefore, Chemotherapeutic agents are Alkylating agents that are toxic to tissues that have rapidly dividing cells

So, this statement by student indicates an understanding of his chemotherapeutic agent.

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3 years ago
Yellowstone National Park has 124 wolves living in it. The park covers 3472 square miles. What is the population density of wolv
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B. 0.0357 wolves/mi
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Answer:

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3 years ago
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Explain where and how diffusion occur in the circulatory and respiratory systems
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The respiratory system is a collection of organs involved in carrying out gas exchange in your body. Deep in the lungs, tiny sacs called alveoli take in oxygen from the atmosphere and release carbon dioxide.

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How does histone acetylation prepare DNA for transcription?Histones and DNA have opposite charges.Acetylation of histones cancel
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Answer: Histones and DNA have opposite charges -True

Acetylation of histones cancels their positive charge- True

Acetylated histones are more attracted to DNA - False

Acetylation creates binding sites for remodeling engines and other factors- True

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It is widely found that acetylation of lysines leads to transcriptional activation. The modifications of histones such as acetylation affect the affinity of the histone for  interacting proteins that control the transcriptional activity of chromatin, which has led to the concept of a histone code.The positive charge on the histones is removed by acetylation, hence they decrease the interaction of histones with the negatively charged phosphate groups of DNA. As a result, the highly condensed chromatin is now transformed to a more relaxed structure and thereby higher level of transcription are achieved

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