How many different alleles are possible? why?

What is produced during the krebs cycle? co2, atp, nadh, and fadh2 pyruvate, co2, and atp atp, fadh2, and h2o h2o, adp, and nadh

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?