Answer the following question given this paragraph: In the gasoline industry, what is called isooctane is actually 2,2,4-trimethylpentane. Draw the structure of isooctane. Q: What do they call 2,2,4-trimethylpentane in the gasoline industry? Choices: - spirogyra - methane - xerophyte - isooctane A:
isooctane
Answer the following question given this paragraph: Telescopes make distant objects appear both nearer and larger. You can see many more stars through a telescope than with the unaided eye. Q: What make distant objects appear both nearer and larger? Choices: - astrolabes - mirrors - lasers - telescopes A:
telescopes
Q: Answer the following question given this paragraph: Lakes and Ponds Lakes and ponds can range in area from a few square meters to thousands of square kilometers. Temperature is an important abiotic factor affecting living things found in lakes and ponds. In the summer, thermal stratification of lakes and ponds occurs when the upper layer of water is warmed by the sun and does not mix with deeper, cooler water. Light can penetrate within the photic zone of the lake or pond. Phytoplankton (algae and cyanobacteria) are found here and carry out photosynthesis, providing the base of the food web of lakes and ponds. Zooplankton, such as rotifers and small crustaceans, consume these phytoplankton. At the bottom of lakes and ponds, bacteria in the aphotic zone break down dead organisms that sink to the bottom. Nitrogen and phosphorus are important limiting nutrients in lakes and ponds. Because of this, they are determining factors in the amount of phytoplankton growth in lakes and ponds. When there is a large input of nitrogen and phosphorus (from sewage and runoff from fertilized lawns and farms, for example), the growth of algae skyrockets, resulting in a large accumulation of algae called an algal bloom. Algal blooms (Figure 44.24) can become so extensive that they reduce light penetration in water. As a result, the lake or pond becomes aphotic and photosynthetic plants cannot survive. When the algae die and decompose, severe oxygen depletion of the water occurs. Fishes and other organisms that require oxygen are then more likely to die, and resulting dead zones are found across the globe. Lake Erie and the Gulf of Mexico represent freshwater and marine habitats where phosphorus control and storm water runoff pose significant environmental challenges. Q: At the bottom of lakes and ponds, bacteria in what zone break down dead organisms that sink there? Choices: - photic - photoreactive zone - trophic - aphotic zone A:
A: aphotic zone
Question: Answer the following question given this paragraph: New species arise in the process of speciation. Allopatric speciation occurs when some members of a species become geographically separated. They then evolve genetic differences. If the differences prevent them from interbreeding with the original species, a new species has evolved. Sympatric speciation occurs without geographic separation. Q: What occurs when some members of a species become geographically separated? Choices: - divergent speciation - symbiotic speciation - reflective speciation - allopatric speciation A:
Answer: allopatric speciation
*Question*
Answer the following question given this paragraph: Fruits may be classified as simple, aggregate, multiple, or accessory, depending on their origin (Figure 32.22). If the fruit develops from a single carpel or fused carpels of a single ovary, it is known as a simple fruit, as seen in nuts and beans. An aggregate fruit is one that develops from more than one carpel, but all are in the same flower: the mature carpels fuse together to form the entire fruit, as seen in the raspberry. Multiple fruit develops from an inflorescence or a cluster of flowers. An example is the pineapple, where the flowers fuse together to form the fruit. Accessory fruits (sometimes called false fruits) are not derived from the ovary, but from another part of the flower, such as the receptacle (strawberry) or the hypanthium (apples and pears). Q: What plant products may be classified as simple, aggregate, multiple, or accessory, depending on their origin? Choices: - flowers - pods - leaves - fruits A:
**Answer**
fruits
*Question*
Answer the following question given this paragraph: Longshore drift carries particles of sand and rock down a coastline. Q: Particles of sand and what other substance are carried by longshore drift? Choices: - magma - bone - soil - rock A:
**Answer**
rock