Which of the following is involved in weathering?
question options:
water
seafloor spreading
mountain building
volcanoes
question 2 1 / 1 point
what types of rocks initially form from deposition?
question options:
igneous
sedimentary
metamorphic
basaltic
question 3 1 / 1 point
air, water, and ice can break rocks into tiny fragments. which of the following best describes this process?
question options:
weathering
deposition
erosion
sediment

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

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.

If a keystone species is removed from an ecosystem