Answer:
mitosis -> cell differentiation -> stem cells
Explanation:
Zygote Definition: a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
Mitosis: a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Cell Differentiation Definition: Cellular differentiation, or simply cell differentiation, is the process through which a cell undergoes changes in gene expression to become a more specific type of cell.
Stem Cell Definition: an undifferentiated cell of a multicellular organism which is capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.
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Since cell differentiation can not come before mitosis so the 2nd option is wrong. Stem cells can not turn into zygote cell option 1 is wrong. Cell differentiation would come before stem cells since stem cells are a final product, the 4th option is wrong. So I think option 3 is correct.
Answer:
A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene.
Answer:
Genetic drift
Explanation:
Genetic drift can also be referred to as allelic drift, it refers to the variation in allelic frequencies within a particular population over a period of time. It can also be referred to as the random fluctuations in the number of genotypes within a population. Genetic drift is not influenced by the environment and is usually more pronounced in a small population of organisms.
For example, a population of birds can consist of green feathers and blue feathers with the green feathers as the dominant allele, but as a result of random fluctuations, the offspring may all be with green feathers and hence could eliminate or reduce the allele responsible for blue feathers over time.
The asthenosphere is just below the lithosphere
I hope this helps:)
