Which of the following are key elements of detrital food webs?
a. Fungi
b. Herbivores
c. Carnivores
d. Plants
a. Fungi
Fungi are key elements of detrital food webs.
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Because they lack well-defined and complex organ systems, we hypothesize that ___ diverged from other animals
A. poriferans B. cnidarians C. choanoflagellates D. bilaterians
You have chosen RNA as the most likely molecule to be first enclosed by a membrane. You understand that it has the ability to store information and can self-replicate, but what else is necessary for simple metabolic processes to occur in a timely manner?
A. A biological catalyst. B. Energy from ADP. C. A pump, to drive a concentration gradient. D. A mechanism to control self-replication. E. Both a mechanism to control self-replication and energy from ADP.
Pollen is derived from mitosis and differentiation of ________
a. the endosperm mother cell b. megaspores c. the integuments d. microspores
This animal has a coelom, a closed circulatory
system, and a clitellum. This animal is ___.
a. an earthworm b. a leech c. a roundworm d. a planarian e. more than one of these