In the deep sea, near hydrothermal vents that spew what seem like toxic chemicals, life still miraculously exists: it is composed of bacteria that are able to convert the hydrogen sulfide from the vents into food through the process of chemosynthesis.Other marine animals like snails, shrimp, and mussels eat the bacteria.They in turn are eaten by octopuses, fish, and crabs.Some of the chemosynthetic bacteria live inside of giant clams; they provide the clams with food, and the clams provide them with necessary elements like nitrogen (and with protection from snails, shrimp, and mussels).Based on what you know about the flow of energy, which animals would be more abundant, the snails or the octopuses, and why?

MCQs on how organisms evolve over time, with particular emphasis on natural selection, evolution, speciation, phylogeny and taxonomy, and aspects of genetics and inheritance. As well as the study of population ecology and ecosystems.