Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? A. 5 B. 3 C. 7 D. 1

What is a Protein-making plant

Why are deserts, tar pits, and ice good places to find body fossils?

If bacteria do not contain a nucleus, will bacteria still have dna?

What causes asthma? A. Bacteria that are resistant to antibiotics infect the body. B. Particular antigens trigger muscle contractions that make it difficult to breathe. C. Antibodies and cytotoxic T cells attack cells in the tissues of the lungs. D.

Which plant adaptation would likely be found in the taiga?

How has the use of pcr improved modern dna forensic science?

Which of the following statements about the Earth's atmosphere is true? It contains 21% oxygen. It contains 78% water vapor. It contains 21% carbon dioxide. It blocks all radiation from the sun.

A cladogram is shown below. Based on the cladogram, which two species share the most recent common ancestor? A. owl and salmon B. lizard and owl C. salmon and rat D. rat and toad

The cell membrane controls movement of materials into and out of the cell. The following particles are moving from high concentration to low concentration and are using a carrier protein.

Where is the moving electric field that causes Earth's magnetic field? A.) earth surface B.) in space C.) earth mantel D.) earth core