Which substances may pass through a cell membrane by simple diffusion?

a. starch and protein

b. protein and fat

c. carbon dioxide and water

d. carbon dioxide and starch

A researcher wants to invite therapists to participate in small focus groups to discuss their perceptions regarding "troubled" adolescent girls and the relationships they have with their parents.

Which organelles are involved in energy conversion? A. mitochondria and chloroplasts B. mitochondria and ribosomes C. smooth and rough endoplasmic reticulum D. Golgi apparatus and chloroplasts

Part d why is pigweed so difficult to control? select all that apply. why is pigweed so difficult to control? select all that apply.

Actin filaments have polarity. This means that the two ends can be identified due to structural differences. The plus end is the end to which subunits are added more rapidly, or the end of polymerization.

What is true about genetic material in prokaryotic and eukaryotic cells? -Eukaryotic cells have short strands of DNA, while prokaryotic cells have long tangled strands of DNA.

If a species is suddenly introduced into a new habitat, what might occur?

Brainliest hurry timed! How many groups did Aristotle use to divide all of the organisms in the world? 1 2 3 4

Carl wants to find out how exercise affects the body temperature of different people. What tool will Carl need in order to conduct his experiment?

3 How does rain form? Water rises, cools, evaporates, and then condenses. Water cools, condenses, evaporates, and then rises. Water evaporates, cools, rises, and condenses. Water evaporates, rises, cools, and then condenses.

Which are biotic factors in an American alligator's environment? Choose all answers that are correct. A. temperature of the water B. amount of oxygen gas in the water C. type of grass needed for nests D. number of available mates