1. What can you infer about the nature of the community in which the owl lives? 2. How can scientists use owl pellets to study small mammals in a specific ecosystem?

Health of Ecosystem

Explanation:

The “owl pellets” aids in the study of the role of owls in the food chain. Pellets can be easily found and interpreted i.e. it gives a  full idea of the diet of the owls and also they tell us that which species live in that area on which owls prey. The pellets also give an idea about the variation in the diet of owls during the season & place which it visits. If we understand the changes in the diet of owls it will help in the conservation of ecosystems because the pattern in which they feed on their prey tells us how different species are thriving out there. The pellet of owl contains remains of prey so we can say that “the more an animal’s remains are found in the pellet the better balanced is the food chain in an ecosystem". For example the remains of small birds found in its pellet gives an idea regarding migration patterns

the answer to your question is b

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.