What are the two main classification of ecosystems?

A. Biotic abiotic

B. Terrestrial and aquatic

C. Closed and open

D. Inputs and outputs

Which type of traits are found on chromosomes that are unique to one sex, either male or female?

Explain why worldwide agriculture could feed more people if all humans consumed only plant material.

A scientist stated the following hypothesis: If I change the temperature of water in a fish tank, it will affect fish breathing rate. Identify the independent variable:

How many cycles of PCR would it take to create 16 copies of a DNA molecule?

Photosynthesis occurs

How does the color of light affect the rate of photosynthesis

What does the term "unzipping" refer to in dna replication? a. polymerization b. breaking hydrogen bonds c. the movement of dna polymerase d. matching complementary nucleotides user: dna replication occurs a. so that a cell can grow. b.

To whom does the Fed lend money? A. Corporations B. Individual citizens C. Other banks D. Small businesses

In garden peas, the axial (A) flower position is completely dominant to the terminal (a) flower position. You cross a true-breeding axial flowering plant to a true-breeding terminal flowering plant.

What is leeuwenhoek most marvelous discovery?