Using the base pairing rules, what base pairs with adenine?

a. guanine

b. cytosine

c. thymine

Which answer best indicates the dynamic balance of an ecosystem? a. space and food vs. temperature and water b. number of plants vs. number of animals c. number and variety of organisms vs. changing environment d. number of organisms vs.

Which statements apply to glycolysis? Splits a glucose molecule into pyruvic acid Occurs without oxygen present Happens only in animal cells Occurs in all living things

Are the bones of the limbs arranged in a smilie or in a very different way in each animal

A high school student starts vomiting and goes to the school nurse. the student asks the nurse what part of his brain makes him vomit. what will the nurse tell the student must be stimulated in order for vomiting to occur?

Suppose a bacterial had a mutated repressor protein that could not bind to the lac operator. how, might this affect regulation of the operon

If a molecule is too large to slip through the spaces in the membrane, how will that molecule enter the cell? A. The molecule will shrink so that it can fit in the spaces. B. The molecule will move through a protein channel. C.

What symbol indicates the cardinal directions

Which will have a better chance of surviving a major change in the environment where it lives: A) A bacteria strain with only twenty minutes between generations B) A large mammal (like bears) with decades between generations Explain your choice

What are the three-letter "words"of mRNA

What are the two ways that carbon enters into the atmosphere?