An elephant pushes with 2000 n on a load of trees. it then pushes these trees for 150 m. how much work did the elephent do

What processes would you expect to be key in the production of yogurt ?

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.