Nylon fiber is classified under which one of these headings?

A. Protein

B. Polyurethane

C. Polyester

D. Polyamide

teractions between cyclins and cyclin-dependent kinases control the cell cycle. Explain how the presence or absence of inhibitors of cyclin-dependent kinases might play a role in normal cells becoming cancer cells.

Choose all of the body fluids that transmit the HIV virus: Saliva Blood Semen Spit Breast Milk Vaginal Fluids Rectal Fluids

Translation involves several different types of tRNA molecules. Which statement best describes how tRNA molecules assemble amino acids into a polypeptide? A. One tRNA molecule assembles the polypeptide, and the others assist it. B.

Explain how cnidocytes with their nematocysts function in food capture and defense.

Which of the following describes an interaction in which one organism kills and eats another?

Paul Templet describes the process of eutrophication in the Gulf of Mexico. According to Templet, which of the following initiates the process? a. Phytoplankton feed on nutrients, which creates plankton blooms. b.

The Alligator and the Python are competing for top predator. What affect can the introduction of a non-native species have on an ecosystem?

When a pitcher is holding a baseball, the ball has what kind of energy. After the pitcher throws the ball, the ball has what kind of energy?

Which species are susceptible to endangerment in the future?

What happens to fresh water that flows into salt water?