Which molecule crosses the plasma membrane by diffusion?

oxygen

glucose

enzymes

all of the above

In what geological era did mammals expand on earth

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. He used a golf ball, a tennis ball, and a soccer ball. He dropped each ball from the balcony once.

A scientist studying stars can estimate the temperatures of stars by their?

Fungi consist of which types of cells? eukaryotes prokaryotes

How can scientists use the two types of waves (P waves and S waves) that earthquakes generate to develop an earthquake warning system in the future?

Which of the following are substances intentionally put in foods to enhance appearance, palatability, safety, and/or quality? recombinant genes persistent organic pollutants (pops) biopesticides food additives

In a healthy human, the typical life span of a red blood cell is

Paula begins to notice that there are patterns to where people sit on the bus, and these patterns differ depending on whether the rider is male or female. Based on these observations, she generates a theory about the behaviors of men and women.

The term for when two organisms which are unrelated look the same after evolving in similar environments. A) adaptive radiation. b) convergent evolution. c) divergent evolution. d) mutation

Which of the following best describes a production quota ? A. Droughts in parts of midwestern US has resulted in lower production of corn. B. Sugarcane growers want to influence the government to limit their production to raise the price. C.