When do both hemispheres receive the same amount of the sun's energy?

only winter solstice

only autumnal equinox

only vernal equinox

both autumnal equinox and vernal equinox

What is a function of the ground tissue of a root

Watch the animation, DNA Replication. After DNA replication, how many double-stranded DNA molecules exist?

Humans have 23 chromosomes true or false?

The Afrikaners are an example of a founder effect that occurs when a new colony is started by a few members of the original population and the random decrease in genetic variation is an example of? A. Genetic drift B. Natural Selection C.

What is one way that calcitonin and parathyroid hormone maintain homeostasis?

Is cellulose a fat, carbohydrate or protien

I mineral must be formed by a manufactured process to be considered a mineral. T or F

The prediction that alcohol slows reaction time is

If you shine a bright light directly in a person's eye, the pupil of the eye will reflexively constrict. using pavlov's terminology, the bright light would be termed the ___, and the pupil constricting would be termed the ___.

Which people do European landowners need to work on their colonial planatations after many of the native American died?