Question

1A. Consider the term chemolithoautotroph. The prefixes "chemo," “litho," and “auto" refer to how the organism meets its needs, respectively, for:

A. Carbon, Energy, Electrons

B. Energy, Carbon, Electrons

C. Electrons, Energy, Carbon

D. Electrons, Carbon, Energy

E. Energy, Electrons, Carbon

1B. All of the following occur during the formation of marine dead zones. Please place them in the correct order.

I) Oxygen levels are greatly reduced

II) An influx of nitrogen occurs

III) Autotrophic bacteria grow

IV) Heterotrophic bacteria grow

A. II, IV, III, I

B. IV, II, I, III

C. I, II, IV, III

D. II, III, IV, I

E. III, II, I, IV

Answer 1

1.A) The answer will be energy, electrons, carbon (Option E).

Explanation: Based on the energy source, an organism can be classified as either photo- or chemo-. Based on electron donor, it can be classified as organo- or litho-. Based on the carbon source, it can be classified as hetero- or auto-. Thus, correct answer will be option E.

B) The answer will be II, III, IV, I (Option D).

Explanation: During the dead zone formation, high amount of nutrients (nitrogen) enters the water & large amounts of autotrophic bacteria grows. When autotrophic bacteria dies & sink to the bottom, heterotrophic bacteria consume them & decomposition can make dissolved oxygen critically low. Stratification of this water will prevent atmospheric oxygen from mixing with it & will create a dead zone.