Which of these animals belongs to the phylum Crustacea?

a. barnacles

b. catfish

c. sponges

d. turtles

How does kidney disease affect the immune system? A. it strengthens it B. it weakens it C. it does not affect it D. none of the above

Is it true that all cells have the same genes, but different genes are active in different cells?

Which of the following is NOT a property of life? A) Organisms take in energy and use it to perform all of life's activities. B) Organisms reproduce their own kind. C) Populations of organisms rarely change over time.

Which characteristic of a population would most affect its survival one threatened by global climate changes A. Biochemical adaptation B. Genetic specialization C. Genetic diversity

Quanto maior for o espaço disponível menor será o desenvolvimento de cristais.

From the following list, which is a limitation to using an electron microscope? can only view live samples the limited amount of magnification the high expense short sample preparation time

Why does air at 75% relative humidity and 30°C make your skin feel stickier than air at 75% relative humidity at 10°C? A. Warm air rises while cold air falls. B. The warmer air contains less water vapor per unit of volume. C.

When the two solutions are mixed, a clear solution with white powder at the bottom results., What has caused this change?

What receptor type is exemplified opening a channel to get sodium into the cell

What is the total amount of tissue of all organisms in a food chain called?