The phospholipid no later regulates the amount of water that travels in and out of the cell.
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it stresses secrecy in scientic investigations
natural selection and common descent are the 2 ideas Darwin used to explain evolution
Answer:
A cell that results from the fusion of sperm and ovum is called a zygote. The process of fusion of sperm and ovum is called fertilization.
Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
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