1. Second Semester Exam – Day 2
7th Grade Science
Second Semester Exam – Day 2

2. Where are you most likely to find the greatest variety and numbers of animal life?

3. If the top portion of plants grow "up," explain why a small tree on a hillside does not grow straight out from the hillside?

4. The roots of plants grown on the space shuttle while in orbit around Earth all have different orientations. A logical conclusion is that the irregular root growth is caused by the lack of -

5. Some species of flowers have markings that are visible only to insects with the ability to see ultraviolet light waves. These markings help the plants —

6. An acorn is a seed. Its shape is very different from the shape of a dandelion seed. Which of the following BEST describes the advantage of the shape of the acorn?

7. A spiny cactus is growing very successfully in an Arizona desert
A spiny cactus is growing very successfully in an Arizona desert. This plant has made adaptations to its native environment that make it successful in harsh conditions. Three adaptations that the spiny cactus has are —

8. Types of Reproduction
The hydra is a very small, simple animal that lives in water. Hydras reproduce asexually by budding, a process in which a bud breaks off an adult hydra and floats away.
How would you describes the heredity of a hydra?

9. Types of Reproduction
A plant breeder is MOST likely to produce offspring with new combinations of traits by —

10. Types of Reproduction
Certain species of whiptail lizards have only female individuals and no males. These lizards reproduce asexually. What is one disadvantage of asexual reproductions for these lizards?