Q: Q: Evolution happens because of what? Read this paragraph and choose the correct option from the provided answers: Evolution happens because of natural selection . Good traits become more common in a population. Bad traits become less common. The deer mouse, species Peromyscus maniculatus gives an example of evolution by natural selection. In Nebraska, this mouse is typically brown. But in places where glaciers dropped lighter sand over the darker soil, the mice are light. Why? Because predators could more easily spot the dark mice on light sand. The lighter mice were more likely to survive and have offspring. Natural selection favored the light mice. Over time, the population became light colored. Enough changes may take place over time that the two types of mice become different species. Choices: - natural resources - natural change - natural process - natural selection A:
A: natural selection

Q: Q: What is the term for the metabolic reaction where living systems build new molecules? Read this paragraph and choose the correct option from the provided answers: Plants and animals exist in a cycle; each requires products of the other. The thousands of coordinated chemical reactions that keep cells alive are referred to collectively as metabolism. In general, metabolic reactions are divided into two classes: the breaking down of molecules to obtain energy is catabolism, and the building of new molecules needed by living systems is anabolism. Choices: - symbolism - connectionism - metabolism - anabolism A:
A: anabolism

Q: Q: The cytoskeleton crisscrosses the cytoplasm, this gives what to the cell? Read this paragraph and choose the correct option from the provided answers: The cytoplasm consists of everything inside the plasma membrane, including watery cytosol and organelles. The cytoplasm suspends the organelles and does other jobs. The cytoskeleton crisscrosses the cytoplasm and gives the cell an internal framework. Choices: - external passageway - internal passageway - external framework - internal framework A:
A: internal framework

Q: Q: Most flowers carry both stamens and carpels; however, a few species are capable of what and are nicknamed "perfect" flowers? Read this paragraph and choose the correct option from the provided answers: Most flowers carry both stamens and carpels; however, a few species self-pollinate. These are known as "perfect" flowers because they contain both types of sex organs (Figure 14.25. Biochemical and anatomical barriers to self-pollination promote cross-pollination. Self-pollination is a severe form of inbreeding, and can increase the number of genetic defects in offspring. A plant may have perfect flowers, and thus have both genders in each flower; or, it may have imperfect flowers of both kinds on one plant (Figure 14.28). In each case, such species are called monoecious plants, meaning "one house. " Some botanists refer to plants with perfect flowers simply as hermaphroditic. Some plants are dioecious, meaning "two houses," and have male and female flowers ("imperfect flowers") on different plants. In these species, cross-pollination occurs all the time. Choices: - sexual reproduction - germination - cloning - self-pollination A:
A: self-pollination