Sexual reproduction is dependent upon? A)only sperm cells
b)only egg cells
c)sex cells
d)somatic cell

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred