Due to their pinnately compound leaves, tropical habitat, and overall appearance members of which phylum are often thought of as a type of palm?
A. Coniferophyta
B. Gentophyta
C. Cycadophyta
D. Ginkophyta
C. Cycadophyta
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Streptomyces produce a number of antibiotics
Indicate whether this statement is true or false.
A population of rabbits increases exponentially until their environment has reached its carrying capacity. Which of the following best describes the cause?
a. Part of the population of rabbits have evolved into a new species that can no longer reproduce with the original species of rabbits. b. The rabbits have become infertile. c. The resources necessary to keep all the rabbits alive have run out. d. The population of rabbits have moved to a new habitat.
In smooth muscle, coordination of contraction throughout the muscle is facilitated by the
a. thick filaments that run through the plasma membrane of one cell into the next. b. electrical connections between muscle fibers. c. parallel arrangement of striations in neighboring fibers. d. reflex arcs stimulating groups of fibers simultaneously. e. elements of the sarcoplasmic reticulum connecting one fiber with another.
Species richness and the relative abundance of
each species determine
a. the species composition of an ecosystem. b. the species diversity of a community. c. the species composition of a population. d. the species diversity of a biosphere. e. the species diversity in a niche