Answer:
Blood types: AB, A, B, and O in ratio 1:1:1:1
Explanation:
The ABO blood group system is employed in Humans. The alleles for blood type A (A) and blood type B (B) are dominant over the allele for blood type O (O).
If a man who is heterozygous for blood type A (AO) marries a woman who is heterozygous for blood type B (BO), the following gametes will be produced by each parent:
AO - A and O
BO - B and O
Using these gametes in a punnet square, the following proportions of offsprings will be produced:
Blood type AB - 1/4
Blood type A - 1/4
Blood type B - 1/4
Blood type O - 1/4
Answer: Human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed biologically, we humans are Hono Sapines, a culture-bearing upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.
The answer is B because theorys explain what happens and why it happens.
Answer:
The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.
