Body functions such as heart rate, blood flow, and digestion are controlled by the:
A. autonomic nervous system.
B. somatic nervous system.
C. automatic nervous system.
D. sympathetic nervous system.
A
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Arrange the following five events in an order that explains the mass flow of materials in the phloem
1. Water diffuses into the sieve tubes. 2. Leaf cells produce sugar by photosynthesis. 3. Solutes are actively transported into sieve tubes. 4. Sugar is transported from cell to cell in the leaf. 5. Sugar moves down the stem. A) 2, 1, 4, 3, 5 B) 1, 2, 3, 4, 5 C) 2, 4, 3, 1, 5 D) 4, 2, 1, 3, 5 E) 2, 4, 1, 3, 5
The larvae of the worm S. stercoralis are the most common found in human stool specimens. Depending on the fecal transit time through the intestine and the patient's condition, both rhabditiform and rare filariform may be present. The treatment of choice for uncomplicated infections is:
a. metronidazole. b. ivermectin. c. pyrantel pamoate. d. combination antihelminthic and board-spectrum antibiotics.
Which of the following molecules are often used as a cloning vector?
a. plasmids b. restriction enzymes c. recombinant DNA d. DNA fragments e. SNPs
During alternation of generations in plants, haploid gametes are produced by mitosis
1.True 2.False