Answer the following question given this paragraph: Q: How do most growing plant cells expand? Choices: - through germination - through cell respiration - through photosynthesis - through water uptake A:
through water uptake
Answer the following question given this paragraph: In addition to the amount of salts, other conditions in ocean water vary from place to place. One is the amount of nutrients in the water. Another is the amount of sunlight that reaches the water. These conditions depend mainly on two factors: distance from shore and depth of water. Oceans are divided into zones ( Figure below ) based on these two factors. The ocean floor makes up another zone. Q: Oceans are divided into zones bases on distance from shore and what other factor? Choices: - temperature - salinity - animal species - water depth A:
water depth
Q: Answer the following question given this paragraph: (a) Amino alcohols are commonly found in phosphoglycerides, which are evident in its structural formula (b). There are two common types of phosphoglycerides. Phosphoglycerides containing ethanolamine as the amino alcohol are called phosphatidylethanolamines orcephalins. Cephalins are found in brain tissue and nerves and also have a role in blood clotting. Phosphoglycerides containing choline as the amino alcohol unit are called phosphatidylcholines or lecithins. Lecithins occur in all living organisms. Like cephalins, they are important constituents of nerve and brain tissue. Egg yolks are especially rich in lecithins. Commercial-grade lecithins isolated from soybeans are widely used in foods as emulsifying agents. An emulsifying agent is used to stabilize an emulsiona dispersion of two liquids that do not normally mix, such as oil and water. Many foods are emulsions. Milk is an emulsion of butterfat in water. The emulsifying agent in milk is a protein called casein. Mayonnaise is an emulsion of salad oil in water, stabilized by lecithins present in egg yolk. Saylor URL: http://www. saylor. org/books. Q: Along with nerve tissue, what kind of tissue are lecithins and cephalins important constituents of? Choices: - heart tissue - lung tissue - skin tissue - brain tissue A:
A: brain tissue
Question: Answer the following question given this paragraph: 19.2 Population Genetics Both genetic and environmental factors can cause phenotypic variation in a population. Different alleles can confer different phenotypes, and different environments can also cause individuals to look or act differently. Only those differences encoded in an individual's genes, however, can be passed to its offspring and, thus, be a target of natural selection. Natural selection works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities. Genetic drift stems from the chance occurrence that some individuals in the germ line have more offspring than others. When individuals leave or join the population, allele frequencies can change as a result of gene flow. Mutations to an individual's DNA may introduce new variation into a population. Allele frequencies can also be altered when individuals do not randomly mate with others in the group. Q: What works by selecting for alleles that confer beneficial traits or behaviors, while selecting against those for deleterious qualities? Choices: - same selection - artificial selection - characteristic selection - natural selection A:
Answer: natural selection
*Question*
Answer the following question given this paragraph: If all three bulbs are set a full intensity, the person sees __________. Q: Chewing insects such as dragonflies and grasshoppers have how many sets of jaws? Choices: - one - four - three - two A:
**Answer**
two
(Q).
Answer the following question given this paragraph: Blood flows through the heart in two separate loops. You can think of them as a "left side loop" and a "right side loop. " The right side of the heart collects oxygen-poor blood from the body and pumps it into the lungs, where it releases carbon dioxide and picks up oxygen. The left side carries the oxygen-rich blood back from the lungs into the left side of the heart, which then pumps the oxygen-rich blood to the rest of the body. The blood delivers oxygen to the cells of the body and returns to the heart oxygen-poor. Q: The right side of the heart collects what type of blood from the body? Choices: - oxygen-rich - dioxide-poor - potassium-rich - oxygen-poor A:
(A).
oxygen-poor