Answer:
B(sperm production)
D(appearance of secondary sex characteristics)
Explanation:
Answer:
What causes genetic variation?
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:
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Answer: Hydrophilic
Explanation:
They have a negatively charged polar head
Answer:
more glucose and change to a blacky-purple colour
Explanation:
Answer:
they are rocks, water, air, soil and living things
Explanation: