Q: Variation in muscle cells gives further insight into some benefits of what type of respiration? Read this paragraph and choose the correct option from the provided answers: Variation in muscle cells gives further insight into some benefits of anaerobic respiration. In vertebrate muscles, lactic acid fermentation allows muscles to produce ATP quickly during short bursts of strenuous activity. Muscle cells specialized for this type of activity show differences in structure as well as chemistry. Red muscle fibers are "dark" because they have a rich blood supply for a steady supply of oxygen, and a protein, myoglobin, which holds extra oxygen. They also contain more mitochondria, the organelle in which the Krebs cycle and electron transport chain conclude aerobic respiration. This is endurance muscle. White muscle cells are "light" because they lack the rich blood supply, have fewer mitochondria, and store the carbohydrate glycogen rather than oxygen. This is muscle built for sprinting. Choices: - natural - enzymatic - aerobic - anaerobic A:
anaerobic

Q: The fungus benefits from the constant supply of food produced by what? Read this paragraph and choose the correct option from the provided answers: A lichen is a mutualistic relationship between a fungus and a photosynthetic organism. The other organism is usually a cyanobacterium or green alga. The fungus grows around the bacterial or algal cells. The fungus benefits from the constant supply of food produced by the photosynthesizer. The photosynthesizer benefits from the water and nutrients absorbed by the fungus. Figure below shows lichen growing on a rock. Choices: - the host - the spermatophyte - the phytoflagellate - the photosynthesizer A:
the photosynthesizer

Q: How many alleles comes from each parent? Read this paragraph and choose the correct option from the provided answers: When gametes unite during fertilization, the resulting zygote inherits two alleles for each gene. One allele comes from each parent. Choices: - none - two - three - one A:
one