Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?
A) Staphylococcus
B) Listeria
C) Lactobacillus
D) Mycobacterium
E) Corynebacterium
C
Bloom's Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.14
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Both DNA and RNA are made up of building blocks known as
A. nucleotides. B. nucleic acids. C. amino acids. D. genes. E. codons.
Explain the significance of what Loewi observed in his experiment with the two frog hearts.
A. It suggests that all vertebrate hearts receive both inhibitory and excitatory signals from different nerves. B. It showed that nerves have a direct electrical effect on heart muscle. C. It showed that neurons communicate with muscle by electrical signals. D. It suggests that a chemical substance released from the first heart, when added to the second heart, reproduced the effects of electrical stimulation.
Assuming that they all belong to the same plant, arrange the following structures from largest to smallest (or from most inclusive to least inclusive)
1. spores 2. sporophylls 3. sporophytes 4. sporangia A) 2, 4, 3, 1 B) 2, 3, 4, 1 C) 3, 1, 4, 2 D) 3, 2, 4, 1
The funnel-like chamber of the kidney that collects urine is called the
A) smooth muscle. B) glomerulus. C) renal pelvis. D) renal medulla. E) renal cortex.