The organelle that best enables an athlete's tissues to be metabolically active are
A. ribosomes.
B. lysosomes.
C. smooth endoplasmic reticulum.
D. mitochondria.
E. contractile vacuoles.
D. mitochondria.
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Which compound in fertilizer do farmers use to inhibit the production of easily leached nitrogen compounds?
A) anhydrous ammonia B) carbonate C) nitrapyrin D) nitrate
More _____ need to be studied in order to find out whether interspecific competition strongly influences the species
composition and structure of most communities.
a. communities b. K-selected species c. r-selected species d. predators e. prey species
Comparing a single-celled eukaryotic organism with a multicellular organism such as yourself identify the major difference from the list below.
a. Escape from predator b. Finding a mate c. Division of labor d. Find its own food e. Nucleus
Two major types of symmetry found in viruses include ________.
A. icosahedral and helical B. helical and radial C. icosahedral and radial D. radial and bilateral