Why do cells have a plasma membrane?

to separate proteins from the nucleus

to define the size of the cell

to separate the inside of the cell from its environment

to distinguish plants from animals

What is not a component of a virus

Where does the heart contract and produce a wave of pressure?

Would an astronomor use x-ray tech.

what is the third bone called inside the ear - the hammer, anvil and ... ? (human anatomy, will give brainliest if wanted)

Which scientist invented the very first optical microscopes and was also the first person to view single-celled organisms living in pond water?

When crossing a true-breeding red snapdragon flower with a true-breeding white flower of the same species, we secure all pink offspring. This would seem to support the pre - Mendel view that inheritance is a blending of parental traits.

Termites are unable to digest some plant materials (iber) Termite stomachs contain bacteria that digest the fber in wood Which type of relationship does this describe?

If there are 50 kcal of energy in the tertiary consumer trophic level, how many kcal would you expect to find in the primary consumer level

Both photosynthesis and cellular respiration are part of the carbon cycle. Which statement best compares these two processes? a) Both release carbon dioxide as waste. b) Both provide organisms with usable energy. c) Both add bacteria to the soil.

What is phosphorus found in?