Energy flow in an ecosystem is
a. cyclical.
b. one-way.
c. two-way.
d. reversible under different conditions.
e. a conservation mechanism
B
You might also like to view...
Answer the following statements true (T) or false (F)
1. Flowers, fruits, and endosperm are defining characteristics of the angiosperms. 2. Lignophytes are seed plants that have become extinct whereas spermatophytes are those that are still living. 3. Terminal complexes in the cellular membranes of plants produce cellulose and are known as rosettes. 4. The K/T event was the transition of plants from water to land. 5. Pteridophytes and seed plants collectively are known as euphyllophytes.
Albinism is a recessive trait controlled by a single gene. If the frequency of albinos in a population is 0.25, what is the expected frequency of heterozygotes for this trait?
a. 0.25 b. 0.50 c. 0.75 d. 0.90 e. 1.00
Members of the genus Staphylococcus are normally associated with ________.
A. mucous membranes B. skin glands C. skin D. All of the choices are correct.
Phagocytes kill a pathogen once it has been ingested, whereas eosinophils and (MAC/NK/NOD) lymphocytes can accomplish extracellular killing by secreting toxins. (Be sure to use capital letters in your answer.)
What will be an ideal response?