Genotype and phenotype ratio for this cross?
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As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

Ducks and beavers both have webbed feet

In 1859, the english naturalist charles darwin published a book entitled on the origin of the species. one of the major ideas that was presented in his book was the theory of natural selection. what was another idea that was presented in his book?