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

Hemoglobin, a protein, is built by ... ?

One example of poaching that is prevalent in your area

You find that there are 47 species living within two miles of your house. This is known as a habitat a population extinctions species diversity

Muscle that turns the palm up a. Supinator b. Semitendinosus

Which of the following is an example of genetic engineering? A. Cross-breeding wheat and corn B. Educating farmers about the advantages of one type of rice over another C. Developing new, biodegradable pesticides D.

By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when no meat was presented. In this experiment, the presentation of the meat was the:

A collection of the same kinds of organisms is called an a) ecosystem b) habitat c) population d) environment e) community

Which of the following would you classify as something other than an animal? A) sponges B) coral C) jellyfish D) choanoflagellates

Flowering plants are classified as

What is the role of trna in protein synthesis?