A hypothesis is an "educated guess."

When a person is exercising, the body needs to deliver increased amounts of oxygen to the muscles. Which component of blood ensures that the muscles will receive it?

Is a frog leaping into the water an example of potential or kinetic energy?

Which class of nutrients in itself does not provide any energy to the human body?

Where do decomposers, such as fungi and bacteria, obtain their food? a) from the Sun b) from primary consumers c) from dead and decaying organisms d) from producers

What is the relationship between DNA and chromosomes? a. Chromosomes are made out of DNA. b. DNA is made out of chromosomes. c. DNA and chromosomes are the same thing. d. DNA forces chromosome to mutate.

Hank likes to explore nearby streams during the summer. However, one winter there is a lot of rain near the stream. How might the stream change before the next summer? A. The stream will have dried up. B. The stream water will be shallower. C.

A woman with rheumatoid arthritis has taken leflunomide for 1 year. she telephones a nurse and says that the result of a home pregnancy test was positive. the nurse should:

Which of Mendel's laws or principles states that gametes carry one allele for each trait?

What is not a name for a chain of amino acids

Why can alternative splicing of messenger RNAs (mRNAs) be advantageous for eukaryotic organisms? A-allows exons from two different genes to be spliced into a new mRNAB-increases the variety of proteins that can be producedC-decreases the average