In mosses meiosis occurs in the
A. gametophytes.
B. antheridia.
C. sporophyte.
D. archegonium.
C. sporophyte.
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Which of the following groups of fungi are found exclusively in association with plant roots?
A. glomeromycetes B. chytrids C. zygomycetes D. basidiomycetes E. ascomycetes
Type 1 fucosidosis is a rare human disease. Patients cannot hydrolyze the disaccharide fucose, and as a result have severe neurological decline and die by age 6. The disease is due to a defect in the gene that encodes the lysosomal enzyme that breaks down fucose (?-1-fucosidase), and is inherited in an autosomal recessive manner. Jane and John have a child who has Type 1 fucosidosis. What is
the probability that their next child will also have the disease? A. No chance B. 1/4 C. 1/2 D. 3/4 E. 4/4 or 100%
Would it be possible and/or appropriate to design a genetic screen to look for a gene(s) involved in homosexuality?
What will be an ideal response?
The atomic number of silicon (Si) is 14. Use the concept of energy shells to predict the number of covalent bonds that Si could form.
A. 2 B. 3 C. 4 D. 8