Q: What pigment is required for photosynthesis to occur? Choices: - carotene - chroma - xanthophyll - chlorophyll A:
chlorophyll

Q: Cutting forests and clearing land has also increased the amount of what in the atmosphere? Choices: - oxygen - smog - pesticides - carbon dioxide A:
carbon dioxide

Q: Q: What are gemstones known as when light cannot pass through them? Choices: - inorganic - blocking - protective - opaque A:
A: opaque

Question: Q: What term describes a gene or sequence on a chromosome that co-segregates (shows genetic linkage) with a specific trait? Choices: - nucleic acid chain - analogous effect - autosomal - genetic marker A:
Answer: genetic marker

*Question*
Q: An estimated 99 percent of the species that have ever lived on earth no longer exist, showing that what event is common? Choices: - accumulation - over fishing - pollution - extinction A:
**Answer**
extinction

Q: Paddles and hammers are examples of simple machines that increase the distance over which force is applied, while reducing what? Choices: - momentum - gravity - intensity - strength A:
strength