Which of the following statements concerning the causative agent of syphilis is TRUE?
A. It is a large helically coiled bacterium motile by means of endoflagella.
B. It is an intracellular parasite.
C. It is a non-motile comma-shaped bacterium.
D. It is a large bacillus with peritrichous flagella.
E. It is pleomorphic and motile by means of gliding motility.
Answer: A
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An example of an invasive species is the __________
a. bald eagle b. black-footed ferret c. snail darter d. zebra mussel
We would expect the greatest difference in plant health between two groups of plants of the same species, one group with mycorrhizae and one group without mycorrhizae, in an environment _____
A) where nitrogen-fixing bacteria are abundant B) that has soil with poor drainage C) in which the soil is relatively deficient in mineral nutrients D) that is near a body of water, such as a pond or river
An endemic species occurs in ___________ geographical area(s).
Fill in the blank(s) with the appropriate word(s).
Your friend is complaining of back pain. She also says that she hurts the most near her neck. What part of her back may have been injured?
A) cervical vertebrae B) thoracic vertebrae C) sacrum D) coccyx