Which of the mechanisms listed below requires energy?

A. endocytosis

B. diffusion of oxygen into a red blood cell

C. osmosis of water across the cell membrane

D. facilitated diffusion of ions through a protein channel

Which of the following is true about living organisms and cells? A. Some living organisms are made of cells, but most organisms are not. B. Most living organisms are made of cells, but some organisms are not. C.

Unlike sexual reproduction, asexual reproduction maintains which characteristic of the original cell? A. size B. shape C. number of nuclei D. number of chromosomes

Coyotes who have been fed sheep carcasses laced with a nausea-inducing poison are less likely to later prey on sheep. This phenomenon is best explained by which classical conditioning concept?

Select all that apply. Biological knowledge can benefit life in which of the following ways?

Calculate the percentage of the cell cycle spent in each stage. Number of cells in given stage : total number of cells counted * 100 = % of the cell cycle spent in this stage

1. Any molecule that contains carbon to hydrogen bonding is known as a A) water B) inorganic molecule C) organic molecule 2. How many valance electrons are generally needed to fill the outer shell of most atoms? A) 4 B) 6 C) 8 3.

Benefits of using coal oil and natutal gas

An ionic bond is most likely to form between: a) a negatively and a positively charged ion. c) two uncharged atoms. b) two positively charged ions. d) two negatively charged ions.

According to conflict theories, who benefits from family structures where women stay home and men work for pay?

What could happen to a Galapagos penguin who was suddenly moved to Antarctica?