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Biology
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If someone has blood type A+: which are his possible genotypes and who can he donate blood to?

The ABO blood type system relies upon the co-dominant alleles IA and IB, which are expressed any time they are present and are dominant over i which is recessive. If someone has bloo...

FT
Answered by Francisco T. Biology tutor
45881 Views

Describe how the small intestine is adapted for efficient glucose absorption. (3 marks)

The small intestine has a very large surface area to increase the amount of area that glucose can diffuse out of the small intestine into the bloodstream. The large surface area is created by villi, which...

MH
Answered by Morgan H. Biology tutor
20779 Views

suggest and explain two ways the cell-surface membranes of the cells lining of the uterus may be adapted to allow rapid transport of nutrients

The membrane is folded therefore has a larger surface area for transport of nutrients by active transport and diffusion. Also, the membrane has a lot of protein carries in the membrane that are used for ...

AS
Answered by Anna S. Biology tutor
11015 Views

Explain why the number of organisms typically reduces along a food chain

The number of organisms reduces because between each level of the food chain about 10% of energy is lost through movement, through not the full organism on the previous level being eaten as bones and hair...

AS
Answered by Anna S. Biology tutor
7577 Views

Explain how DNA is replicated within the cell.

DNA is replicated within the nucleus of the cell through a process called semi-conservative replication. The first part of the process involves the splitting of the double stranded molecule into two separ...

CB
Answered by Callum B. Biology tutor
2723 Views

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