MacConkey agar plates represent ________ medium
A) a minimal
B) a selective
C) a differential
D) both a differential and a selective
E) both a minimal and a selective
D
Bloom's Taxonomy: Comprehension
Section: Culturing Microorganisms
Learning Outcome: 6.10
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The morphology of plants is determined
A. by cell division at the tip of the shoots and cell elongation at the tip of the roots. B. by cell division at the tip of the roots and cell elongation at the tip of the shoots. C. by cell elongation at both the tip of the shoots and the roots. D. by cell death (apoptosis) along the radial axis. E. by cell division at both the tip of the shoots and the roots.
Which of the following is not true of a viroid?
A) Cadang-cadang is a viroid disease of the coconut palm. B) Its RNA is circular. C) Its capsid is quite small. D) Viroids possess about 250—400 nucleotides. E) Viroids affect mostly plants.
Which description of skeletal muscle is correct?
a. Each cell contains one nucleus. b. The fibers and filaments are arranged in parallel. c. Sarcomeres work in opposite directions during contraction. d. Actin power strokes produce the contraction. e. The thin filaments are situated in the middle of each sarcomere.
The genetic preservation of the features that increase the likelihood of survival and reproduction of some individuals within a population is called the process of
A. natural selection. B. creation of new species. C. inheritance of acquired characteristics. D. genetic drift. E. increasing evolutionary resistance.