Which of the following is true of Viagra? It
a. can cause hearing loss.
b. can cause sudden headaches.
c. can result in long sustained erections.
d. is used to overcome complications due to
circulatory problems.
e. does all of these.
Answer: e
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The emergence of land plants correlated with the near ____ of the genes that bryophytes inherited from a(n)____
ancestor.
a. doubling; liverwort b. doubling; algal c. tripling; liverwort d. tripling; algal e. quadrupling; algal
Intracytoplasmic sperm injection is one technology for correcting which fertility issue?
a. A woman cannot produce viable eggs. b. A man makes sperm, but does not ejaculate properly or does not ejaculate enough sperm to allow fertilization. c. A woman has normal eggs but they cannot be fertilized. d. A man has non-viable sperm. e. A woman can produce eggs and they can go through fertilization, but none of the eggs can implant properly.
Which of the following statements most accurately describes the structural components of fungi?
A. The vast majority of fungi are multicellular organisms that are composed of a mycelium as well as individual hyphae. Cellulose is a structural carbohydrate that makes up the cell wall of fungi. B. The vast majority of fungi are unicellular organisms that are composed of a mycelium as well as individual hyphae. Chitin is a structural carbohydrate that makes up the cell wall of fungi. C. The vast majority of fungi are multicellular organisms that are composed of a mycelium as well as individual hyphae. Chitin is a structural carbohydrate that makes up the cell wall of fungi. D. The vast majority of fungi are multicellular organisms that are composed of a single hyphae and multiple mycelium. Chitin is a structural carbohydrate that makes up the cell wall of fungi.
When a segment of DNA duplicates, causing two copies of a gene to be present in the chromosome, the duplicate copy could possibly (Check all that apply)
A. gain a new function due to mutation. B. become a centromere. C. become a pseudogene. D. lose function due to mutation. E. become an ortholog.