Which of the following is NOT true regarding an
incomplete digestive system?
a. Food enters a saclike gut.
b. Food and wastes pass through the same opening.
c. Food is only partially digested in this system;
therefore, fecal material is good fertilizer.
d. This system favors regional specialization.
e. There is two-way traffic of materials in this
system.
Answer: d
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What are advantages of root meristems originating at the pericycle, rather than at other root structures (e.g., the epidermis)? Select all correct choices
A. New roots form only at the tips of preexisting roots, reaching deep water sources. B. New roots are directly connected to the xylem and phloem of pre-existing roots. C. New roots form outside of the Casparian strip and can absorb more nutrients. D. New roots can sprout from any location (i.e., not just nodes) on pre-existing roots.
Small fishes that eat zooplankton are ________
A) primary consumers B) producers C) tertiary consumers D) secondary consumers
Which of these factors will limit the size of a population?
A. availability of food and energy B. disposal of waste C. interaction with other organisms D. All of these answers are correct.
A developing country's replacement fertility rate is most directly affected by which factor?
A. Poverty B. Endemic diseases C. Death of children before the age of reproduction D. Environmental factors that disrupt fetal development E. Government-directed population control