Recently, an experiment has shown just what a mission to Mars might be like for a crew of astronauts. Six men went on a pretend trip to Mars called Mars500. After 257 days, they "landed" on a model of the planet. Some of
them left their steel capsule in heavy spacesuits. They walked into a sand-covered room that was made to look
like the surface of Mars. They took "samples" of the sand. They also pretended to do experiments. The other crew
members stayed on the ship.

the mena mission.

A: avoided
B: celebrated
C: practiced
D: remembered

Biologists recognize five levels of cell organization. the lowest and simplest is the cellular level. organisms here are either unicellular organisms, like protozoa, or colonial organisms. colonial organisms are composed of single-celled individuals that stay together to sustain the life of the whole colony. next on the scale of complexity is the level occupied by tissue. a tissue is a group of similar cells which perform a similar activity. tissues that are organized around a common function together make up an organ, the third level of complexity. the fourth level of organization is the system, formed by a group of organs which together perform a specific bodily process. the fifth and highest level is the organism level, in which body systems work together in a structure capable of independent life. main idea:

One important character trait which levi to compete well is revealed in the first paragraph. it is that a) he is often fearful. b) he thinks before he acts. c) he tends to be suspicious. d) he is good at finding hidden things.

In the essay “drowning in dishes,” what is ironic about the fact that danial’s first position in his new job is the dishwashing station?