2. How did European explorers lead to an early form of globalization? 3. How did sailors and early astronomers help each other out?

4. Why would the Moon make a better place than Earth from which to launch a mission to Mars?

5. What will be the focus of the American research effort on the International Space Station?

6. Is it possible to send astronauts to Mars? What do people say is the main constraint?

7. NASA’s budget accounts for what share of overall US federal spending? What has the peak been since 1975?

8. Identify two types of consumer goods on which the American people spend more annually than they do on NASA’s budget.

9. How does space exploration encourage the study of science and technology?

10. How do technologies such as the personal computer or the cell phone lead to economic growth?

11. How is MRI technology a byproduct of the space program?

12. Explain what you think would happen if the United States stopped
exploring space while other nations continued to do so.

Alichen is an organism that structurally appears to be a single organism. but a lichen is actually two different organisms—a fungus and green algae—living together as one organism. the fungal partner derives its nutrition from the photosynthesizing algae. how does a lichen differ in its photosynthetic activity from elysia chlorotica, the sea slug that’s considered to be a photosynthesizing animal? a. in lichens, the fungi photosynthesize on their own, while elysia chlorotica forms a relationship with a photosynthesizing plant. b. in lichens, the relationship with the algae lasts throughout the life cycle, but in elysia chlorotica, the relationship occurs only during the immature juvenile stage of the slug’s life cycle. c. lichens can photosynthesize only because of the living algal partner, while elysia chlorotica incorporates chloroplasts from algae into its cells. d. in lichens, the association between the fungi and algae is permanent, while elysia chlorotica associates with a photosynthesizing organism only when it requires food.

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.