SCI 200--Practice Milestone 2 rated A+ passed 2023

SCI 200--Practice Milestone 2 rated A+ passed 2023Which characteristic is representative of an exponential population growth model? Produces an S-shaped curve Shows the effect of limiting factors Reflects a population's carrying capacity Reflects growth in an ideal situation Reflects growth in an ideal situation Which statement prizes species for their intrinsic value, rather than for their ecosystem services? Bees are valuable because they pollinate many foods that humans eat. This lake should be protected because it attracts thousands of tourists every year. Redwoods must be preserved because they inspire awe. The cheetah should be protected because it is the fastest land animal in the world. The cheetah should be protected because it is the fastest land animal in the world. Choose the statement below that correctly explains the nitrogen fixation process. Fertilizers are needed to fix nitrogen so it is usable; they allow the nitrogen to be absorbed by plants and passed on to the animals that eat them. Micro-organisms in the roots of certain plants take nitrogen from the air and pass it on to the animals that use it to build DNA, proteins and muscle. Nitrogen is found in DNA and amino acids, which are released through animal urination and absorbed by bacteria in the soil. When animals die, nitrogen is formed by decomposers in the soil; bacteria attach themselves to plant roots and release the nitrogen into the atmosphere. Micro-organisms in the roots of certain plants take nitrogen from the air and pass it on to the animals that use it to build DNA, proteins and muscle. Which statement accurately describes the "estuary" biome? Tends to have low levels of biodiversity Can be hot or cold, but always very dry Most grazing animals live here Freshwater and saltwater mix here Freshwater and saltwater mix here Select the example of an invasive species. Introduced zebra mussels disrupt the food chain by eating plankton that is food for many fish The domestic cat came out of Egypt thousands of years ago The koala is only found in Australia White-tailed deer thrive in a forest with a wolf population Introduced zebra mussels disrupt the food chain by eating plankton that is food for many fish There are many challenges to protecting endangered species, including identifying a species in danger in time to reverse the threat against it. Select a possible solution to the environmental issue of protecting endangered species from the options below. Establish nature preserves. Eliminate corridors. Offer incentives to encourage the trade of endangered species. Encourage human activity in endangered habitats. Establish nature preserves. Choose the statement that correctly explains how carbon is cycled. Animals eat plants and create carbon dioxide, plants release carbon and use water and sunlight to grow. Plants release carbon as sugars; animals consume plants and convert the sugars to carbon dioxide again. Plants pull carbon dioxide from the air and grow; animals eat plants and grow, releasing carbon dioxide back into the air. Animals use carbon that is released by plants, which converts to sugars when ingested and back to carbon dioxide when exhaled. Plants pull carbon dioxide from the air and grow; animals eat plants and grow, releasing carbon dioxide back into the air. According to the graph shown here, in which month is the "carrying capacity" first reached? Month 6 Month 5 Month 4 Month 7 Month 6 Which statement is true about energy and trophic levels within a food web? It is more effective to eat organisms at lower trophic levels. Each trophic level receives about 24% of the energy of the preceding level. Energy transfer between trophic levels is a highly efficient process. There is no limit to the number of trophic levels in an ecosystem. It is more effective to eat organisms at lower trophic levels.