How can plants protect themselves?

A) They release toxins

B) They become acidic

C) All of the above

D) They produce salicylic acid

Yeast and apple juice were put into warm water and bubbles started to rise. Which is most likely the gas being released and the process causing it?

Which term refers to a mathematical formula that correlates with body fat?

Which of the following is not required by animals to control body temperature? A. Animals must be able to conserve heat when temperatures drop. B. Animals must be able to get rid of excess heat when temperatures increase. C.

Which single bond present in nitroglycerin is most likely the shortest?

How much of an 800-gram sample of C14 is left after 3half-lives?

Most of cellular respiration take place in what

An ocean trench forms when?

The fact that a strain of yeast with a certain defective gene can use the human version of the gene to repair itself is evidence that yeast and humans

What is the difference between a meteor and a meteorite? A meteor has more mass A meteorite reaches Earth and has not burned up A meteorite orbits the sun and a meteor does not A meteorite glows

Which of these was NOT characteristic of the first cells on Earth? A) anaerobic B) prokaryotic C) single-celled D) contained organelles