Ulva is a genus of algae in the phylum Chlorophyta. What characteristic does Ulva share with ferns?
A. Vascular tissue for the transport of substances.
B. An embryonic sporophyte housed in maternal tissues.
C. The ability to synthesize organic nutrients using light.
D. Intercellular communication via plasmodesmata.
E. The production of sperm and eggs for reproduction.
Answer: C
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Based on the data in the figure above, which of the following statements are correct?
I) Area 1 would be considered a desert because of its high average temperature. II) Area 1 has more average precipitation than Area 2. III) Area 2 would be considered a desert because of its low average precipitation. IV) Area 2 has a larger annual temperature variation. A) only I and III B) only II and IV C) only I, II, and IV D) only II, III, and IV E) only I, II, and III
In establishing paternity by DNA fingerprinting, what proportion of microsatellite repeat alleles in a child come from the father?
A) only those on the X chromosome B) 1/4 C) 1/2 D) 3/4
Research on transgenic Drosophila models of Huntington disease has found that ____
a. the NUB1 protein decreases levels of mutant huntingtin protein, and thereby, cell death b. the mutant huntingtin protein is destroyed by the SOD1 protein c. Drosophila and humans share more than 90% of genes d. the accumulation of mutant proteins in the brain causes Huntington disease e. treatment of patients with Rhes protein cures Huntington disease
The pertussis (whooping cough) vaccine has virtually eliminated whooping cough in the United States
Indicate whether the statement is true or false