Q: Answer the following question given this paragraph: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species. Q: What type of species have a large effect on the balance of organisms in an ecosystem? Choices: - decomposers - producers - secondary consumers - keystone A:
A: keystone

Q: Answer the following question given this paragraph: Q: In what group of animals several forms of asexual reproduction are found? Choices: - crustaceans - arthropods - insects - invertebrates A:
A: invertebrates

Q: Answer the following question given this paragraph: Raptors such as hawks and owls are carnivores. They hunt and eat mammals and other birds. Vultures are scavengers . They eat the remains of dead animals, such as roadkill. Aquatic birds generally eat fish or water plants. Perching birds may eat insects, fruit, honey, or nectar. Many fruit-eating birds play a key role in seed dispersal, and some nectar-feeding birds are important pollinators . Q: What kind of diet is typical for raptors, such as hawks and owls? Choices: - fishes - carnivorous or herbivorous - herbivorous - carnivorous A:
A: carnivorous

Q: Answer the following question given this paragraph: Homeostasis refers to the balance, or equilibrium, within the cell or a body. It is an organism's ability to keep a constant internal environment. Keeping a stable internal environment requires constant adjustments as conditions change inside and outside the cell. The adjusting of systems within a cell is referred to as homeostatic regulation. Because the internal and external environments of a cell are constantly changing, adjustments must be made continuously to stay at or near the normal proportions of all internal substances. This involves continual adjustments in transport of substances across the cell membrane. Homeostasis is a dynamic equilibrium rather than an unchanging state. The cellular processes discussed in the cell transport (passive and active transport) concepts all play an important role in homeostatic regulation. Q: What term means the adjusting of systems within a cell in order to restore balance or maintain equilibrium? Choices: - systemic regulation - aftertouch regulation - gaseous regulation - homeostatic regulation A:
A: homeostatic regulation