2. A. Rubber is a conductor and transfers electricity from the wire.
3. B. Changing tides.
4. B. The fossils may have been moved by man, animals, or Earth's constructive and destructive processes.
5. A. They are produced by drought.
6. C. Stores heredity information.
7. D. Magnets have a set strength , while the strength of an electromagnet can be adjusted.
8. A. Temporary dam.
9. B. Invertebrates.
10. C. Human feces.
11. No answer.
12. A. Gas.
13. C. Increase the number of coils of copper he puts around the nail.
14. A. Sam is correct. It is not a physical change.
15. C. Landslides.
The correct option is D.
The removal of water from the dam will reduce the amount of oxygen that can be dissolved in the water. The plants and the animals that live in the marsh need the oxygen gas to survive, thus the reduction in oxygen content of the water will have negative effects on the plants and the animals that live in the marsh.
Answer:
Switching to sustainable energy sources such as solar power, hydroelectric power and wind power can reduce the amount of fossil fuels being used up. Fossil fuels are natural resources from the environment, but when burned the waste product of it is released into the environment and can potentialy affect other natural resources. Switching to a renewable energy source can help conserve natural resources. Renewable energy sources can be used to harness the energy we need without producing harmful products that affect the environment and it's resources.
In the ozone layer. That is in the stratosphere.
Answer:
B. False.
Explanation:
The statement is false because secondary spermatocytes are the product of the <u>first meiotic division </u>(meiosis I), NOT the second meiotic division (meiosis II).
The meiosis II produces spermatids from the secondary spermatocytes (that were produced in meiosis I).
After meiosis II, the sermatids go through spermiogenesis, the process where these type of cells mature and become motile spermatozoa.
