Why do cells have plasma membrane?

A. To separate the inside of cell from its environment

B. To separate proteins from the nucleus

C. To define the size of cell

D. To distinguish plants from animals

A population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over time, this dust has settled on the trees in the area, making them darker in color. this could result in 1.

Carbon' can form four bonds, so it can create large complex molecules. Why is that? HINT: remember what is needed to make 'happy atoms' and what type of bond carbon uses to be happy. A Carbon forms short, simple carbon atoms.

Which part of the plant body serves as anchorage to the plant? Root Stem Bark

Fossil fuels are a. A natural resource b. Renewable c. Made from minerals d. Burned in hydroelectric plants

Which of the following is a consequence of acid deposition? Group of answer choices A) It increases the likelihood of low-lying ground fogs. B) It results in offshore eutrophication, damaging coral reefs.

Which trophic level does a fish represent in food chain? Algae-> mosquito larva->dragonfly larve-> fish-> man A Tertiary B Secondary C Detritus

Which process produces a greater number of offspring?

Two species might have similar skeletal structures that have different functions. what do these types of structures suggest about the relationship between the two species?

Which of these choices provides a direct refutation of an argument found in this passage, that viruses are NOT living organisms?

If you contorted your face in disgust over a foul smell in what ways would your face change