Answer the following question given this paragraph: Dalton's theory was soon widely accepted. Most of it is still accepted today. The only part that is no longer accepted is his idea that atoms are the smallest particles. Scientists now know that atoms consist of even smaller particles. Q: What was once believed to be the smallest of all particles, as dalton's theory proposed? Choices: - nucleus - molecule - neutron - atom A:
atom
(Question)
Answer the following question given this paragraph: Power plants are where electric power originates. They have electric generators that generate electric current through electromagnetic induction. Q: Where does electric power originate? Choices: - the Sun - magnets - coal mines - power plants A:
(Answer)
power plants
Ques: Answer the following question given this paragraph: In warmer regions, plants and bacteria grow faster. Plants and animals weather material and produce soils. In tropical regions, where temperature and precipitation are consistently high, thick soils form. Arid regions have thin soils. Q: What happens to growth of plants and bacteria in warmer regions? Choices: - they mutate - they are stunted - they grow slower - they grow faster A:
Ans: they grow faster
(Q).
Answer the following question given this paragraph: The Chesapeake Bay (Figure 20.15a) is one of the most scenic areas on Earth; it is now in distress and is recognized as a case study of a declining ecosystem. In the 1970s, the Chesapeake Bay was one of the first aquatic ecosystems to have identified dead zones, which continue to kill many fish and bottomdwelling species such as clams, oysters, and worms. Several species have declined in the Chesapeake Bay because surface water runoff contains excess nutrients from artificial fertilizer use on land. The source of the fertilizers (with high nitrogen and phosphate content) is not limited to agricultural practices. There are many nearby urban areas and more than 150 rivers and streams empty into the bay that are carrying fertilizer runoff from lawns and gardens. Thus, the decline of the Chesapeake Bay is a complex issue and requires the cooperation of industry, agriculture, and individual homeowners. Of particular interest to conservationists is the oyster population (Figure 20.15b); it is estimated that more than 200,000 acres of oyster reefs existed in the bay in the 1700s, but that number has now declined to only 36,000 acres. Oyster harvesting was once a major industry for Chesapeake Bay, but it declined 88 percent between 1982 and 2007. This decline was caused not only by fertilizer runoff and dead zones, but also because of overharvesting. Oysters require a certain minimum population density because they must be in close proximity to reproduce. Human activity has altered the oyster population and locations, thus greatly disrupting the ecosystem. The restoration of the oyster population in the Chesapeake Bay has been ongoing for several years with mixed success. Not only do many people find oysters good to eat, but the oysters also clean up the bay. They are filter feeders, and as they eat, they clean the water around them. Filter feeders eat by pumping a continuous stream of water over finely divided appendages (gills in the case of oysters) and capturing prokaryotes, plankton, and fine organic particles... Q: Oysters require a certain minimum population density because they must be in close proximity to do this? Choices: - multiply - replicate - feed - reproduce A:
(A).
reproduce
Ques:Answer the following question given this paragraph: Eleutherozoa are the echinoderms that can move. This group includes the starfish and most other echinoderms. Q: Like other bryophytes, moss plants spend most of their life cycle as what? Choices: - zygotes - copepods - protozoa - gametophytes A:

Ans:gametophytes
Question: Answer the following question given this paragraph: An aquifer is an underground layer of rock that is saturated with groundwater. One of the biggest aquifers in the world is the Ogallala aquifer in the American Midwest. Q: An aquifer is an underground layer of rock that is saturated with what? Choices: - ocean water - wastewater - oil - groundwater A:
Answer:
groundwater