Breaking a rock into smaller pieces by natural causes is known as

a. erosion.

b. the rock cycle.

c. chemical weathering.

d. mechanical weathering.

One student group hypothesized that the dry baker's yeast must be alive.the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life

Golden rice is an example of what? a.dna replication b.pest control c.genetic engineering d.mitosis

Which is not a reason to gentically modify an organism? a.changing the dna of a crop plant to make it resistant to pesticides b.changing the dna of a crop plant to make it produce more yield per acre c.changing the dna of a crop plant to make it resistant to insects d.changing the dna of a crop plant to make it more susceptible to pest insects