Answer:
I think the answer is coal
Answer:
D) largest mass extinction event in Earth's history
Explanation:
The cambrian era started following the pre-cambrian extinction
Answer: Hi.... I hope it helps!!
Skin Pigmentation in humans
Explanation: Polygenic inheritance- It is simply a single characteristic which is controlled by more than two genes. Human skin's color is determined by the amount of dark pigment it has which is melanin
. Minimum four genes are involved in the melanin production.
It is a case of continuous variation as the combination of melanin producing allele are responsible for degree of pigmentation
<span>If a person has type B blood, only anti-A antibodies are present in his or her blood.</span>
About 20 astronaut have faced fatalities during the space program.
