For years, biologists called most prokaryotes "bacteria." Which statement best explains why a biologists now divide prokaryotes into two distinct categories?

The amount of net secondary productivity cannot exceed the amount of net primary productivity. a. True b. False

Which foosils are usually discovered at the top of the rock

In which direction does the dna polymerase move on the lagging strand during polymerization events?

Molecules present in the early environment of the earth, before life arose

How many amino acids cannot be made by the body, so they must be obtained in the diet?

Which of the following are outputs of the process of photosynthesis? A. Energy from food and oxygen B. Energy from the sun, carbon dioxide, and water C. Nutrients from food and oxygen D. Food and oxygen

Which of the following are examples of ways humans and plants have coevolved? Pick all that apply A. Humans have bred plants to use as food B. Plants provide a source of nitrogen C. Humans aid in pollinating plants D.

By what mechanism does PI-3 phosphate promote activation of protein kinase B (PKB) ? a. recruiting PKB to the plasma membrane b. recruiting the activating kinase PDK1 to the plasma membrane c.

What is the definition of "Mass"?

Which of the following is a correct statement? Select one: a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from. b.