1. Do you think there is life on other planets in our solar system? Explain your answer.
2. Which do you think is more likely: humans visiting an alien planet or aliens from another planet visiting us?
3. Do you think humans should try to set up a colony on Mars? Why or why not?
4. If humans moved to another planet or to a moon, what sort of special equipment would be necessary for survival?
5. If you had the opportunity to live on another planet, but you wouldn't be able to get back to Earth for 10 years, would you do it? Why or why not?

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one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?