Answer the following statements true (T) or false (F)
1. Phagocytes can only ingest objects that they are able to attach to.
2. The terms “leukemia” and “leukopenia” both refer to an abnormally low number of circulating leukocytes.
3. Ehrlichia spp. are intraleukocytic pathogens.
4. Chemokines are chemotactic agents that are produced by various cells of the human body.
5. Perspiring, swallowing, and urinating are all considered to be part of the first line of defense.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. TRUE
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During meiosis in an organism where 2n = 8, how many chromatids will be present in a cell at the beginning of
meiosis II? a. 2 b. 4 c. 6 d. 8 e. 12
The change of a larval form of insect to a different adult form is known as
A. a chrysalis. B. an instar. C. incomplete metamorphosis. D. tagmosis. E. complete metamorphosis.
Four of the following maintain genetic equilibrium and allele frequencies. Which one is the exception?
a. lack of gene flow b. large population interbreeding freely c. differential survival and reproduction d. random mating e. absence of mutations
In a competitive interaction in which species 1 has a higher carrying capacity (K1 ) than species 2 (K2 ), it is expected that species ________ will go extinct
Fill in the blank(s) with correct word