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Blood vessels near the surface of the skin constrict to prevent heat loss to the environment and maintain blood flow around the central organs. This is called vasoconstriction. Also, skeletal muscles cont...

Mitochondria have a double membrane structure, with an inner layer with many folds to create a high surface area. This provides more space for more metabolising proteins and therefor they are able to crea...

Inhale. Internal intercostal muscles relax. External intercostal muscles contract. Ribcage moves up and out. Diaphragm contracts and flattens. Volume in lungs increases. Pressure in lungs decreases. Air m...

Farmers could keep information on their cows such as the milk yield of a bull's mother and daughters in order to select ideal bulls as male parents. These bulls would then be allowed to mate with (unrelat...

Higher concentration of water outside the cell/lower concentration of solutes outside. Water moves into the cell, down a concentration gradient and through a selectively permeable membrane via osmosis