Until the ___, scientists thought organic chemicals could only form by actions of living things.

A.) Twenty-first century

B.) 1980's

C.) mid-1800's

D.) none of the above

What happens as a direct result of an endangered species dying out? A. Loss of biodiversity B. Ecosystem balance C. Habitat loss D. Climate change

Why might some species might have similar body structure

If an organism does not have its own means of locomotion and it produces new cells out of inorganic materials through the photosynthetic process, it is: A plant An animal Either a plant or animal

If you are awakened from sleep and you feel as though you had not even been asleep, then you were most likely in which stage of sleep?

Glycogen is the storage form of glucose used by animal cells which can be broken down for energy when glucose is used up?

The fight-or-flight reaction occurs during which stage of gas?

The gene for flower position in pea plants exists as axial or terminal alleles. Given that axial is dominant to terminal, list all of the possible F1 and F2 genotypes and phenotypes from a cross involving parents that are homozygous for each trait.

What role does gravity play in mass movement

Why don't all plants have chloroplasts?

You step on something in the yard resulting in a puncture wound that does not bleed freely. antigens from any microbes that entered the wound will most likely end up in the