Which of the following is an essential role played by large intestine bacteria?

A. produce gas

B. absorb bilirubin

C. synthesize vitamin K and B-complex vitamins

D. synthesize vitamins C and D

Are any bacteria made of more than one cell?

How are permineralized fossils formed

Which statement best describes one way that both plants and animals fight pathogens? A. Both have an antigen-antibody response. B. Both have a protective outer layer. C. Both produce lymphocytes. D. Both have a lymphatic system.

Autotroph is to producer as heterotroph is to a. herbivore b. consumer c. decomposed d. carnivore

Which statement about basaltic magma is false? a. It forms when rocks in the upper mantle melt b. It contains small amounts of silica c. It has high viscosity d. It forms on oceanic and continental crust

Recall the steps of building a protein

You expect interstitial endocrinocytes (interstitial cells of Leydig) to be rich in which of the following?

Which of the following is an example of sustainability? A) cutting down all the trees in a forest without replanting any B) consuming more cattle than are being born C) recycling a metal can so it can be reused D) leaving the lights on in a room you

What is the major force responsible for the formation of an α-helix in protein secondary structure?

Some people believe fire is alive. It moves it seems to know where to go, it reacts to its environment.