Which compound was abundant in Precambrian Earth's oceans, before complex life evolved on Earth?

A.

dissolved oxygen

B.

dissolved carbon dioxide

C.

dissolved methane

D.

dissolved ammonia

Which is a monomer of a protein?

Which phenomenon occurs when the Sun crosses the plane of Earth's equator

Large biological molecules that carry out essential roles within organisms

What happens to your body if any of the 6 nutrients types above is missing for too long?

A is the condensed visible from of chromatin

Test your knowledge about the specific functions of the five types of white blood cells 1. Release histamine, which promotes inflammation. 2. The cytoplasm is a thin ring around the nucleus. 3.

Which could decrease the human carrying capacity? Question 1 options: corrupt governments energy crisis epidemic disease unequally distributed resources

Explain how a trait might seem to "disappear" for a generation, and then "reappear" in the following generation

What neurotransmitter is released by the axon of a sympathetic preganglionic neuron to communicate with the sympathetic postganglionic neuron?

Is the spinal cord part of the peripheral nervous system?