Does natural selection increase or decrease variation within a population

If Mike drove for nine hours at a speed of 105 km/h, how far did he drive in meters

Put the steps of primary succession in the correct order? Short grasses grow tall in the rich soil. When pioneer species die, nutrient are added to the soil, Lichens begin to grow on the surface of exposed rocks.

Which is the function of the valves within the heart and veins?

A scientist is comparing the outer layer of an onion celk to the outer layer of a human skin cell. What is unique about the outer layer of the onion cell compared to the skin cell

Which statement best represents how structure relates to function

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?

Is Exothermic/Endothermic related to Product/Reactant Favored?