Food web is many over lapped food chains in an ecosystem

true

or false

Which of the following are examples of sexual reproduction? A bacterium copies its DNA and divides into two daughter cells in a process called binary fission.

Which of the following shows the greatest promise as a cancer chemotherapy agent? a) a drug that interferes with organismal cellular respiration b) a drug that prevents tetrad formation c) a drug that prevents crossing over d) a drug that prevents

One reason why RNA molecules are the leading candidate as the first informational molecule is that a. some RNA molecules can function as enzymes. b. RNA nucleotides are a major component of cell membranes. c.

Where do the two chromosomes that make up a homologous pair come from?

Which medullary index indicates a human hair? A. 0.653 B. 0.733 C. 0.516 D. 0.256

Which of the following is a prediction based on the cell theory that all organisms are made of cells, and all cells come from preexisting cells?1. If you boil nutrient broth and place it in an air-tight flask, cells will appear in the broth2.

During photosynthesis, the energy from sunlight is used to split water molecules. What happens to the hydrogen ions that are split from the water molecules?

Which part of a scientific argument must be supported by valid data

What is used as evidence for continental drift

Ocean floor rocks are. Continental rocks