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:
bone
Explanation:
it takes decades for it to decay so it remains can be preserved
Answer:
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Answer:
there are 8 main characteristics
Explanation:
1. hair and fur
2. mammary glands
3. single boned lower jaw
4. one time tooth replacement
5. three bones in middle ear
6. warm blooded metabolism
7. diaphragm
8. four chambered heart