Which of the following substances is directly involved in photosynthesis?

chlorophyll

phospholipid

mRNA

oxygen

chromatin

Which statements explain the gas exchange that happens at the alveoli? Check all that apply.

Which of the following has the highest viscosity? ice cold water, honey, coffee, milk

Loggerhead sea turtles eat a variety of things including vegetation, jellyfish, and crabs. Young loggerheads have many predators, but the large adults are generally safe from all except large sharks and seals.

In order to obtain energy, plants must do what? a. produce food b. release seeds c. make new cells d. consume food

When oxygen is low or not present, which process occurs so that ATP can still be produced Question 2 options: Frementation Glycolysis Active Transport Pyruvic Acid

What is the name of the heart's contraction?

Which describes the habitat of a frog?

The size of a population refers to the

An electric current will always follow a. the path of least resistance. b. a path toward the north pole. c. a path toward the south pole. d. the path that leads through insulators.

What are some questions that biologists might ask about the living things they study?