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Describe how a vaccine leads to production of antibody against the disease (4 marks)

This question is asking for an outline of how antibody is produced in an immune response, and for the 4 marks, we need to identify 4 or more steps using key words in this process. This question could also...

Answered by Erin P. • Biology tutor

2406 Views

Sophie accidentally puts her hand on an open flame, she immediately withdraws her hand. This is an example of a reflex reaction. Describe how a reflex reaction is coordinated.

Reflex reactions are subconscious, they bypass the brain. Receptors detect a sensory stimulus, in this case- pain. Receptors stimulate sensory neurons, creates an electric impulse which travels to the spi...

Answered by Amelia L. • Biology tutor

1437 Views

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

7742 Views

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

10970 Views

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

3207 Views