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Biology
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Explain, with a digram, the difference between meiosis and mitosis

Meiosis produces 4 daughter cells from the original parent cell. These cells are haploid cells- they have half the number of chromosomes that the parent cell, and the process creates gametes for sexual re...

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Answered by Heather T. Biology tutor
2387 Views

What is the purpose of mitochondria in the cell?

Mitochondria is the power house of the cell, it's a membrane bound organelle which generates energy for cellular activity (e.g. protein production) by generation of ATP through aerobic (requires oxygen) r...

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Answered by Imade R. Biology tutor
2725 Views

What is crossing-over?

In prophase I of meiosis, homologous, non-sister chromatids form connections called chiasmata at matching loci. The complex then splits to give chromatids with different combinations of genes than were pr...

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Answered by Emma S. Biology tutor
2532 Views

Where do all the stages of respiration (aerobic and anaerobic) happen?

The first part of aerobic respiration is to convert glucose into pyruvate in a series of reactions known as glycolysis, which happens in the cytoplasm of cells. Glycolysis consumes 2 molecules of ATP and ...

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Answered by Eve L. Biology tutor
2222 Views

Describe the process that allows an action potential to be passed across a synapse in the parasympathetic nervous system.

The action potential arrives at the presynaptic knob and causes the depolarisation of the plasma membrane. This causes voltage gated calcium channels to open allowing calcium to diffuse into the presynapt...

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Answered by Rebecca O. Biology tutor
1973 Views

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