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The atria have a shorter contraction time as the ventricles as they only need to pump blood into the ventricles. The contraction time of the ventricles is longer as they need to pump blood through the aor...

There are many ways that animals are adapted to live in dry conditions. First, a decrease in surface area reduces water loss by minimising sweating. They may also have long eyelashes ...

Plant cells have choloroplasts and animal cells do not, plant cells have a vacuole and animal cells do not, plant cells have a cell wall while animal cells only have a membrane

3 Fatty acid chains and 1 Glycerol 

The yellow banded shell provides camouflage to the snail in grassland areas. These are more difficult for the birds to see, so less are eaten by predation. As a consequence, more yellow banded snails surv...