Top answers

Biology
A Level

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 di...

CH
Answered by Cara H. Biology tutor
2816 Views

In ecology, what does the phrase 'carrying capacity' refer to and what factors may determine it?

Carry capacity refers to the maximum population size a species can reach in a particular environment.Important factors in determining carry capacity (among others):Food availabilityPredator population siz...

JG
Answered by Jacob G. Biology tutor
3605 Views

30% of a population lacks the ability to taste the chemical PTC. Non-tasters are homozygouse recessive for this tasting gene. What percentage of the population are tasters and what percentage of the population are NOT heterozygous for this trait?

This question requires the knowledge of two equations from the Hardy-Weinberg Principle. p + q = 1 and p2 + 2pq + q2 = 1 where p = dominant allele, and q = recessive allele. Firstly ...

FH
Answered by Fergal H. Biology tutor
5947 Views

What is natural selection and how is it different from evolution?

Natural selection can be defined as: The gradual process in which inherited characteristics become more or less common in a population, in response to the environment determining the breeding success of i...

HC
Answered by Harry C. Biology tutor
2767 Views

How is blood glucose regulated?

High blood glucose levels - such as following a large, carbohydrate rich meal. The increase is detected by Beta cells of the pancreas, which relea...

LK
Answered by Lois K. Biology tutor
2916 Views

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