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3 years ago

What is the role of spindle fibers in mitosis

Biology

2 answers:

Minchanka [31]3 years ago

8 0

The role of spindle fibers is to form protein that separates genetic material inside a cell.

balandron [24]3 years ago

7 0

Answer:

Spindle fiber can be defined as the fiber that helps in the process of mitosis as it forms a protein that aids in the division of the genetic material.

This fiber is very important to equally divide the chromosomes which divides the parent cell into 2 similar daughter cells when the nuclear division takes place in the cell..

The spindle fiber during the time of mitosis is known as the mitotic spindle.

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Dafna1 [17]

Answer: Thanks for the tips.

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3 years ago

Carbon is rare in that it does NOT bond with any other elements.

sveta [45]

Answer:

False

Explanation:

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2 years ago

Which accurately describes gymnosperms? Check all that apply. Some of them lose their leaves in winter.Some of them lack seeds.S

AleksandrR [38]

I think that correct answers are:
Some of them lose their leaves in winter. (i.e. Larix)
They include the tallest plants (i.e.Sequoia)

I don't think they are the oldest type of seed plants, since in the past the classes like progymnosperms and seed ferns existed prior to the gymnosperms. But question isn't absolutely clear to me and I can't be 100% sure.
All of the gymnosperms have seeds unless human grows some seedless variant.
Gymnosperms don't have flowers like angiosperms do, but some people think that cone is kind of flower.
Male cones produce pollen, not female.
Hope I helped :)

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3 years ago

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How are traits passed from parent(s) to offspring in sexual vs. asexual reproduction?

Ahat [919]

Answer:

Heredity

Explanation:

the passing on of physical or mental characteristics genetically from one generation to another

3 0

3 years ago

The data obtained from the meselson–stahl experiment after one generation of replication eliminated the dispersive model of dna

Sedaia [141]

<h2>Given statement is false</h2>

Explanation:

According to dispersive model of DNA replication,DNA molecules are hybrids of parental and daughter DNA;In this model each individual strand is a combination of original and new DNA

Meselson and Stahl did an experiment on DNA replication using E.coli bacteria

E.coli was grown in a medium containing heavy isotope of nitrogen,bacteria took up the nitrogen and used to synthesize new biological molecules,including DNA
It was grown for many generations,the nitrogenous bases of the bacteria's DNA were all labelled with heavy nitrogen
Bacteria were then switched to light nitrogen isotope and allowed to grow for several generations
They then measured the density of the DNA using density gradient centrifugation
This method separates molecules such as DNA into bands by spinning them at high speeds in the presence of another molecule, such as cesium chloride
Each DNA produced two DNA molecules each with one new strand and one old strand called semi conservative replication(half of the parental DNA conserved in daughter DNA)
Each DNA strand act as a template for synthesis of new strand
Hence,dispersive model of DNA was eliminated and semi-conservative model of DNA replication was proved by the above experiment

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3 years ago

Read 2 more answers