An average what takes about 5 kilograms of Carbon Dioxide a year and makes about the same amount of oxygen for us to breathe.

How are hormones and prostaglandins similar? how are they different?

Explain why the forest ecosystem is a system.

Which of the following are good conductors under normal conditions? Check all that apply. A. plastic B. a penny C. gold D. air E. water F. ceramic

Which of the following types of cells is a gamete? nerve blood egg muscle

What is the largest and most complicated joint in the human body?

If a bird is moving at a velocity of 70 km/h east and a car is moving at a velocity of 80 km/h east, what is the velocity of the bird relative to the passengers in the car? A. 10 km B. 10 km/h C. 10 km/h west D. 70 km/h east

Does bigfoot exist?

An observable trait in a species of frog is controlled by a single gene. The gene has only two alleles, F and f, and F shows complete dominance over f. A predator is introduced into a population of 400 frogs, of which 100 are homozygous recessive.

The area in the brain that plans, anticipates, and controls impulses and is the last part of the brain to mature is the

What event occurs prior to speciation