Top answers

Describe how a sperm cell is adapted to its role

Contains enzymes to digest egg cell wallFull of mitochondria to supply energy for movementtail for swimming Sperm contains generic material to transfer to the egg
RJ
Answered by Rachelle J. • Biology tutor
3899 Views

How does the body respond to a decrease or increase in core body temperature?

If the temperature decreases:The blood vessels supplying the skin constrict (vasoconstriction) resulting in less blood flow to the skin surface and hence less energy (by heat) is lost. Hairs stand on end to ...
PJ
Answered by Portia J. • Biology tutor
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Describe the process of aerobic respiration.

Respiration is the process by which cells make energy. Aerobic respiration uses oxygen to make energy. Respiration involves a series of reactions. The overall equation for the reaction is:Oxygen + Glucose —&...
MH
Answered by Madlen H. • Biology tutor
3836 Views

Describe the process of evolution by natural selection as developed by Charles Darwin in the 1800s.

Evolution by natural selection occurs when random mutations in the genome of an organism causes phenotypic traits (observable characteristics or traits) to be different between individuals of an organism. Th...
JW
Answered by Jack W. • Biology tutor
3932 Views

Describe how oxygen moves into the blood at the lungs.

Oxygen moves via diffusion from the alveoli in the lungs where there is a high concentration of oxygen, into the blood where there is a low concentration of oxygen - it moves down its concentration gradient.
IS
Answered by Isobel S. • Biology tutor
7806 Views