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Brrunno [24]
3 years ago
12

What is made when a sperm cell combines with the polar nuclei?

Biology
1 answer:
balandron [24]3 years ago
8 0

Answer:

Explanation:Two of the nuclei (the polar nuclei) move to the center of the embryo sac and fuse together, forming a single, diploid central cell. This central cell later fuses with a sperm to form the triploid endosperm, which will ultimately provide nourishment for the developing embryo (analogous to yolk in animal eggs).

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A therapist indicates that a client no longer has to record his daily activities if he can maintain a sober lifestyle. This is a
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The answer is positive reinforcement.

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The process of recording all the daily activities helps the patient to create conscience of what he does and how these actions could potentially develop situations where the, in this case, drinking problem could come back. After a time doing it, the person creates this conscience without the need of recording it, and the therapist highlights this fact by allowing the patient to stop recording his daily activities.

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What term best describes the rock outer layer of the Earth?
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Methane is an example of a molecule whose Adams are held together by which of the following
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It’s a covalent bond.

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Which statement about air is correct?
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Air is essential for all organisms

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hich of the following amino acids can contribute to the three-dimensional structure of a protein by forming covalent bonds with
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Cysteine contributes to the three-dimensional structure of a protein by forming covalent bonds with an identical amino acid in another part of the protein.

<h3>What is the Cysteine Structure?</h3>
  • Covalent disulfide bonds form between the sulfhydryl (-SH) groups of cysteines in different parts of a protein are very important in determining the three-dimensional shape of the protein.
  • is a HOOC-CH-(NH2)-CH2-SH proteinogenic amino acid that is semi-essential. Cysteine's thiol side chain frequently functions as a nucleophile in enzyme processes.
  • The sign Cyz is occasionally used when a deprotonated catalytic residue is present.
  • The sign Cym can also be used to usually denote the deprotonated form.
  • The thiol is capable of being oxidized to produce the disulfide derivative cystine, which is crucial for many proteins' structural integrity. Cyx is sometimes used in this context. It carries the E identifier E920 when added to food.
  • The codons UGU and UGC encode the amino acid cysteine.
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To know more about Cysteine with the given

brainly.com/question/14835777

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