One reason that bacteria can be harmful is that they:

A. can remove nitrogen gas from the air.

B. have cell walls with peptidoglycan.

C. can produce toxins that kill other cells.

D. live in the digestive tracts of animals.

Which one of the following phrases describes many countries within Asia and africa

Which of the following is a pseudoscience? Biology Chemistry Astrology Physics

What is the atomic mass of any given element? only the neutrons in the atomic nucleus only the protons in the atomic nucleus the sum of all protons and neutrons in the atomic nucleus the sum of all electrons in the atomic nucleus

Why are decomposers important? They break down dead and decaying organic material. They return nutrients and elements to a usable form in the environment. They consume the most energy of all the trophic levels. Both A & B are correct.

Researchers are investigating processes that happen durning digestion. Which answer choice describes only a physical change durning digestion?

Describe the process through which allopatric speciation splits 1 species into 2 distinct ones

What is an example of a limiting factor that humans use to control the carrying capacity of an environment for a particular type of organism? Explain your answer.

How does natural selection support the theory of evolution? A. Natural selection explains how the changes in life forms that evolve over millions of years take place over shorter periods of time. B.

Example of wave amplitude

Which biome is likely to be the home of zebras and lions?