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What is necessary for photosynthesis to occur?

Essentially, photosynthesis is the process by which plants convert light energy to produce sugar. It needs water, light and carbon dioxide to occur and produces oxygen and sugar/carbohydrates. Photosynthesis...
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Answered by Claudia C. • Biology tutor
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What is the function of the nucleus in an animal cell?

The nucleus contains all of the genetic information of the cell. This genetic information is the DNA. DNA is deoxyribonucleic acid, and through this the cell is able to complete its functions through transcr...
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Answered by Isabelle V. • Biology tutor
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In humans, males are XY and females are XX. Why are sex-linked characteristics more common in males than females?

The recessive allele is always expressed in males, whereas females need two recessive alleles (homozygous recessive). Females could have dominant and recessive alleles, which would mean they are carriers, bu...
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Answered by Caitlin C. • Biology tutor
3572 Views

Explain how the mammalian pancreas controls blood sugar concentration after a meal.

The pancreas consists mainly of exocrine tissue (<98%) which produces pancreatic enzymes required for digestion. The remaining endocrine tissue is organised into Islets of Langerhans which contain 5 diffe...
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Answered by Cara H. • Biology tutor
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It is common to selectively breed domestic animals/pets, such as cats and dogs. Give three reasons people may want to selectively breed dogs.

For aesthetic reasons (shorter snout, lighter fur etc)To reduce allergensTo reduce aggression To breed out genetic defects
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Answered by Ruby F. • Biology tutor
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