(Question)
Q: What is it called when pollen from one plant fertilizes another plant of the same species? Choices: - cross-typing - cross-breeding - cross - vegetation - cross-pollination A:
(Answer)
cross-pollination

(Question)
Q: Which of the animals digest cellulose with the aid of methanogens? Choices: - pigs - apes - goats - cows A:
(Answer)
cows

(Question)
Q: What substance comes toward earth's crust through mantle plumes? Choices: - rocks - water - gas - magma A:
(Answer)
magma