Homozygous is alleles which are the same, A way I remember it is Homozygous "Homo" which is know as the same so its hhtt or HHTT, heterozygous is when the alleles are different like tTHh, It is not found anywhere, it is terms to describe genotypes.
Cohesion means cohesionrefers to the sticking together of alike molecules, such as water molecule being attracted to another water molecule.
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Answer:
Petroleum, also called crude oil, is a fossil fuel. Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria. ... Millions of years ago, algae and plants lived in shallow seas
