Mutation are two types somatic and germ cell mutation...as there is mutation in germ cell it will alter the normal behavior and produce variation !
random fertilization also causes variation as different setup of genes meets with another different...so chances of variation increases !
and third crossing over is in meiosis when chiasmata forms....so in this two homologous chromosome attach to each other and on separation ... some part exchange so leads to variation !
C........................................................................
Answer:
C. Shape is the correct answer
Explanation:
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A. a form of gene
it can be either recessive or dominant
Answer: Sieve tubes and cytoplasm.
Explanation:
