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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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I have mutant cells that make no pfk2enzyme. i measure rates of oxygen consumption in these mutant cells and compare them to wil
Kazeer [188]

The correct answer is that mutant cells will exhibit diminished oxygen consumption; decreased glycolysis results in decreased Kreb's cycle and electron transport chain.

The PFK2 enzyme catalyzes the generation of F26BP, this binds with the allosteric site of PFK-1 and increases the affinity of PFK-1 with F6P and also decreases the affinity of allosteric inhibitors citrate and ATP to PFK-1. Thus, PFK-1 will combine with F6P at a greater rate.

This ultimately results in more glycolysis, thus, more ETC and more consumption of O2. If there is no PFK2, then there will be a reduction in glycolysis, TCA, ETC, and consumption of oxygen.

The PFK2 is an enzyme accountable for monitoring the rates of gluconeogenesis and glycolysis in the human body. In the absence of glycolysis, there will be a reduction in TCA, ETC, and consumption of O2.

5 0
3 years ago
Carbon ______________ are processes that add carbon to the atmosphere. Carbon ______________ are processes that absorb carbon
OlgaM077 [116]

Answer:

Carbon sources

Carbon sequestration

Explanation:

Carbon sources are regions that produces atmospheric carbon dioxide. This carbon dioxide is naturally added to the atmosphere when organisms respire, decompose, rocks with carbonate are weathered and volcanoes erupt.

Carbon sequestration is the process of taken and storing atmospheric carbon dioxide. The method helps in reducing the amount of carbon dioxide in the atmosphere which in turn reduces global climate change.

8 0
2 years ago
Genes that are found along a DNA molecule hold instructions to build (blank).​
mylen [45]

Answer:

To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies. Each DNA sequence that contains instructions to make a protein is known as a gene.

Explanation:

7 0
4 years ago
Identify the difference between theory and a law.
almond37 [142]

Answer:

Theory is not definite, while Law is.

Explanation:

A Theory is an idea or set of ideas that has proven itself many times, but has certain loopholes that prevent absolute certainty.  Meanwhile, a Law is a Theory without loopholes.

3 0
3 years ago
Read 2 more answers
The molecule which transfers the information from the nucleus
____ [38]
Answer: B) RNA

The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made.
4 0
3 years ago
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