What era happened after the precambrian?

What does the comprehensive environmental response compensation and liability act (superfund) do? a. It encourages businesses to keep hazardous waste sites open. b. It mandates the clean-up of abandoned hazardous waste sites open. c.

Green algae is considered an ancestor of modern plants because a) They have chlorophyll contained in chloroplasts b) They are the largest of all of the algae c) They also have brown and red pigments d) They are producers

Which two systems provides the molecules needed for the metabolic activity that takes place at ribosomes?

Which substance makes up most of the environment inside a cell? a. carbohydrates b. proteins c. water d. ATP

Human are not the only animals that pollute the air

Darwin argued that the beak size and shape of Galapagos finch species was related to their a. body size. b. food source. c. time of reproduction. d. flight pattern.

What is an earth revolution, what shape is it's path, and how long it last

Mitosis and meiosis are methods of cell division. Which of the following is true of these two methods? A. Meiosis involves only one division, while mitosis involves two divisions. B.

What is empirical evidence and what is it not

What is a theory in biology