1.If a wolf eats a herbivore, the energy is transferred . 1. directly from the plant
2. directly from the sun
3. indirectly from the plant
4. indirectly from the herbivore

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem

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.

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture