What is the variable a scientist changes on purpose?

A. Control group

B. Constant variable

C. Dependent variable

D. Independent variable

Which of the following are NOT used to read DNA sequences? a. nucleotides c. fluorescent dyes b. gels d. double-stranded DNA molecules

History: When did stem cell research become known? Who discovered stem cells? What experiments or studies have been conducted so far?

In glycolysis, the isomerization of glucose to fructose is necessary because

in pinus sp. male cone matured earlier than female cone. describe how this species the success of pollination

The tube that carries food and oxygen from mother to baby is the

What two factor will make a star bright?

What are the standard units of specific gravity? a) g/cm^3 b) kg/L c) kg/cm^3 d) none

Explain why the number of tuskless elephant in Uganda may be increasing.

A person who has a disorder caused by a recessive allele is a. considered a carrier of the disorder. b. homozygous for the recessive allele. c. unable to pass the allele to offspring. d. certain to have offspring with the disorder.

After strenuous exercise sore muscles can occur because of? A. A stretching of the muscle tissue B. Too much oxygen in the blood C. A buildup of lactic acid in the tissues D. Too much glucose in the blood