The dominant stage in the life cycle of tracheophyte plants is the
A. epiphyte generation.
B. sporophyte generation.
C. spore generation.
D. gametophyte generation.
E. angiosperm generation.
B. sporophyte generation.
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A person has the genotype XXY. What syndrome does this person have and what sex are they?
A. Klinefelter....male B. Klinefelter ....female C. Turner...male D. Turner....female E. no syndrome...male
Approximately how long will the body's store of glycogen last if there is no other energy source?
a. 24 hours b. 3 months c. 3 weeks d. 12 hours e. 2 hours
What structures are used by bacteriophages to attach to host cell receptors?
A. Tail fibers B. Capsid heads C. Nucleic acids D. Viral sheaths
The figure is a photomicrograph of
a. a nucleus. b. a Golgi body. c. endoplasmic reticulum. d. a vacuole. e. a nucleoid.