Precambrian rocks contain fossils of:
a. only single celled organisms.
b. great forests of flowering plants.
c. the first insects.
d. cells and simple organisms.
e. primitive fish.
D
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The phylum ____ consists of about 200 known species of nonvascular plants that produce hornlike sporophytes, and
are the only land plants whose chloroplasts contain alga-like protein bodies called pyrenoids.
a. Hepatophyta b. Monilophyta c. Bryophyta d. Lycophyta e. Anthocerophyta
Four of the five answers are traits that Homo sapiens had compared to earlier species. Select the exception
a. smaller teeth and facial bones. b. a more prominent chin. c. a higher and rounder skull. d. the capacity for spoken language. e. shorter body form.
Guanine and uracil are examples of nitrogenous bases.
a. true b. false
A ratio of the dose of the drug that is toxic to humans versus the minimum effective dose for that pathogen is assessed to predict the potential for toxic drug reactions. This is called the
A. minimum inhibitory concentration (MIC). B. Kirby-Bauer technique. C. antibiogram. D. E-test. E. therapeutic index (TI).