What is true of exercise and aging?
a. Tendons stiffen with age but are no more likely to tear
b. Strength training slows age-related loss of muscle tissue.
c. Exercise stimulates the addition of new muscle fibers in people of all ages.
d. Exercise causes muscle mass to increase in old people as much as in younger ones.
b
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What is responsible for storing oxygen for muscle activity?
a. Hemoglobin b. Myoglobin c. Lactic acid d. Blood
What is the function of endosperm?
a. food for animal pollinators in flowers that don’t have nectar b. food for the sprouting seedling c. food for developing pollen grains d. food for the growing pollen tube e. food for the developing fruit
The super continent _____ included the landmasses that are currently found in the southern hemisphere
a. Antarctica b. Pangea c. Eurasia d. Caprica e. Gondwana
Warming wetland peat, melting permafrost, and vanishing arctic ice are all examples of ________________ related to climate change
A. eutrophication B. a negative feedback loop C. a positive feedback loop D. soil formation E. dynamic equilibrium