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Describe the hormone changes which lead to ovulation.

Follicle stimulating hormone (FSH) secreted from the pituitary gland stimulates egg maturation and oestrogen secretion from the ovaries. Oestrogen in turn inhibits FSH release and stimulates luteinising horm...
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How does vaccination lead to immunity?

Vaccination involves administering a dead or inactive form of a pathogen to a subject, which stimulates white blood cells into producing antibodies specific for that pathogen. If the subject encounters the s...
TD
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Describe how you can distinguish between a bacterium and a virus.

Viruses are generally smaller than bacteria and are not living, whereas bacteria are considered as living species as a prokaryote. Viruses have no cytoplasm, cell membranes or cell wall and instead have a pr...
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Answered by Keshana K. • Biology tutor
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What is the difference between mitosis and meiosis?

Mitosis is a process associated with organism growth, and it involves a tetraploid cell dividing to give two genetically identical diploid cells. Meiosis is the process by which gametes are formed, and it in...
TD
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There is an increasing worry about the rise of antibiotic-resistant bacteria, such as MRSA. How can doctors ensure that this threat is minimised? (2 marks)

Doctors can ensure that there is a reduced number of antiobiotics prescribed for patients. They can also make sure that patients are fully evaluated so as to stop the prescription of antibiotics for viral in...
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Answered by Alex T. • Biology tutor
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