Answer:Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Explanation: I hope you understand!
Introns because they are coding sequences.
Exons because they are non-coding sequences.
Answer:
endoplasmic reticulum
Explanation:
ER is full with proteins than help to synthesize phospholipids in plant cells
Creating or controlling a situation by causing something to happen rather than responding to it after it has happened.
