Which statement describes a DNA molecule?

a) it is single stranded

b) it has a double-helix shape

c) it is made completely of protein.

d) it contains two types of nitrogenous bases.

1. Predict: The jar contains helium gas. What would happen if the lid of the jar was removed?

What do you call the living part of an environment? A. abiotic B. ecosystem C. population D. biotic

Where in your spirogyra cell does photosynthesis, which creates the biological molecule used for fuel, occur?

Why are some planets made of frozen gases and others solid?

Which interdisciplinary branch of biology most likely invented the electrocardiogram, which is used to measure heart activity?

Which term describes this example? A child with no freckles has a mother who has freckles and is heterozygous and a father who has no freckles and is homozygous recessive. a. female b. heterozygous c. homozygous recessive d. homozygous dominant e.

At which of the following temperatures will the average energy of motion of the particles in a substance be greatest? A. - 12 C B. 0 C C. 12 C D. 20 C

In Wisconsin a very large population of lake trout in which individuals mate at random experiences no migration mutation nor selective pressure for a number of years. Which of these is most likely to occur in the population?

How much time do most experts agree is required to allow for muscle recovery before engaging in muscular strength/endurance weight lifting of the same muscle group? 6 hours 12 hours 18 hours 48 hours

What are some changes that can occur in ecosystems