Which of the following eras occurred first?

A. Precambrian

B. Mesozoic

C. Cenozoic

D. Paleozoic

Energy required for life mostly comes from? A) nuclear energy B) solar energy C) geothermal energy D) potential energy

A child burns several fingers during a classroom cooking activity. your immediate action should be to

With regard to enzymes key is to lock as

Schleiden made what scientific discovery

Que debe suceder con las celulas sexules para dar inicio a la generacion de un nuevo ser vivo?

What is the gradual sequential regrowth of a community of species after a forest fire?

Why are bacteria needed in the nitrogen cycle? A) Other living things cannot use atmospheric nitrogen. B) Other living things cannot use the nitrogen in plants. C) Bacteria are the main nitrogen reservoir.

Ant lions are small insects that dig funnel-shaped depressions in sandy areas. They hide in the dirt at the bottom of the funnel.

What is the procedure/variables for the plate tectonics lab

A gene has the base sequence that starts with TCG GAC CAT CGA. What would be the complementary DNA strand formed from this DNA?