What is the primary source of energy in a food chain

1. oxygen

2. sun

3. Carbon dioxide

4. water

How much does a human brain weigh?

Which of the following is a main function of a stem? to anchor the plant to the ground to store water for the plant to store food for the plant to bring water to the plant

Which procedures were followed in this lab to decrease experimental error? Check all that apply. using only two types of seeds, both from the same source having one student count every sprout in every quadrat using adjacent plots of land for both

What is the average life expectancy for someone with HIV? Does life expectancy differ around the globe?

What does DNA that contain? A. The chromosomes that build proteins B. The coded blueprint for life C. The ability to translate RNA code D. The factors for heredity called alleles

Australopithecines were the ancestors of monkeys. A. True B. False

A mutation that causes a human have 11 toes is (neutral, harmful, or beneficial.)

Cells of a fungus and an animal

Is cytoplasm prokaryotic or eukaryotic

Professor Jones surveyed her six classes and found that students who slept less than 5 hours the night before an exam received lower exam scores than those students who slept 7 hours or more.