A network of interactions that involves the cycling of materials and the flow of energy among organisms and their physical environment is ____.

A. a population
B. a community
C. an ecosystem
D. the biosphere
E. the habitat


Answer: C

Biology & Microbiology

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Monocytes and lymphocytes are agranular leukocytes.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Materials in sedimentary cycles

a. pass through both a solid and a gaseous phase. b. are never present as gases in the ecosystem. c. are present as liquids in the earth but as gases in the atmosphere. d. pass through both a solid and a gaseous phase and are present as liquids in the earth but as gases in the atmosphere. e. exist only in solid rocks.

Biology & Microbiology

According to the Linnaean system of classification, the organism Acetabularia mediterranea is most closely related to

A. Mediterranea crassa. B. Acetabularia crenulata. C. Mediterranea crenulata. D. Crenulata acetabularia.

Biology & Microbiology

An important tool for identification of bacteria was developed by (H. C. Gram/R. Koch/S. Winogradski).

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology