Gram-positive organisms with low G + C content are commonly called __________.
a. proteobacteria
b. mycobacteria
c. Spirochaetes
d. Firmicutes
Answer: d. Firmicutes
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Answer the following statements true (T) or false (F)
1. Damage to the seminal vesicles would prevent sperm from becoming motile. 2. Erectile dysfunction can be treated by drugs that increase levels of nitric oxide. 3. FSH stimulates the activity of Leydig cells and LH stimulates the activity of Sertoli cells. 4. A human female has the largest number of primary oocytes at the onset of puberty. 5. FSH secreted by the pituitary stimulates fluid secretion into the antrum of the follicle.
Plants that produce scentless, inconspicuous flowers with enormous amounts of pollen are adapted to which type of
pollination? a. wind b. birds c. bats d. small rodents e. insects
Which of the following statements about plants grown in hydroponic culture is true?
A. They cannot be used for commercial purposes. B. They are suspended with their roots in a nutrient solution. C. They are unable to photosynthesize. D. They no longer need to transport water through their xylem. E. They rarely get enough micronutrients.
Residual virulence is a risk factor in the use of subunit vaccines.
Answer the following statement true (T) or false (F)