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Mitosis is the process of cell division, it occurs in humans and in plants. Compare and contrast the process of mitosis in human cells and in plant cells (5 marks)

(1) shape- in animal cells round before division, plant cells maintain shape throughout. (1) centrioles- present in animal cell mitosis, form the spindle fibre AND Absent in plant cells, spindle fibre for...

Answered by Amelia L. • Biology tutor

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Outline the reasons why insects and other animals need well-developed transport systems (3 marks)

This question has 3 marks attached to it, therefore the examiner is looking for three clear points.

Larger organisms tend to have higher metabolic demands as they are more active.

Answered by Vaibhav D. • Biology tutor

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What are the limiting factors of photosynthesis?

A limiting factor is an environmental factor that restricts metabolic reactions from occurring within an organism. The 3 main limiting factors in photosynthesis are the light intensity, carbon dioxide con...

Answered by Antonia H. • Biology tutor

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What is the difference between natural selection and evolution?

Evolution is the gradual change in the alleles of a species over time to make it more suited to its environment. Natural selection is when certain members of a population have an advantageous allele makin...

Answered by Hannah D. • Biology tutor

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Describe the necessity for a reflex action to occur when, for example, touching a hot surface (2)

A reflex action is much faster than a normal, conscious movement, which enables a person to remove themselves from a dangerous stimulus much faster, to reduce the damage which would be caused if a reflex ...

Answered by Leo D. • Biology tutor

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