Which best describes a pilus?

A. A tube that extends from a bacterium

B. A piece of DNA transferred by a virus

C. A virus that causes a common cold

D. A protective shell around a bacterium

There are 30,000 genes are on a single chromosome

Fossil fuels contain energy that originally came from a. tidal forces. b. Earth's core. c. the sun. d. dinosaurs.

Prior to Mendel's findings, what was thought about plant hybrids?

Two grizzly bears are fighting over a fish to feed themselves. What kind of interaction is this scenario, which works as a limiting factor in the bears' survival? A. apparent competition B. interference competition C. exploitation competition D.

What is a compound calcium water air or iodine

What is a large, slow-moving rock slab that is part of Earth's crust?

What are food chains?

What happens first in animal response

Can blood got through the plasma membrane?

What is the phenotype ratio for a monohybrid cross of two heterozygous individuals?