All of the following situations are passive modes of penetration for the invasion of host tissues by opportunistic pathogens EXCEPT
A. a bacterium adhering to intravenous tubing, forming a biofilm.
B. a hiker being bitten by a tick.
C. a child falling and scraping her knee.
D. a firefighter receiving third-degree burns on the skin.
Answer: A
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To carry out glycolysis, a cell must have glucose and mitochondria.
a. true b. false
With which of the following would hemizygosity most likely be associated?
A) incomplete dominance B) X-linked inheritance C) sex-limited inheritance D) autosomal dominance E) codominance
Which process occurs in both mitosis and meiosis?
A. crossing-over B. replication of DNA C. pairing of homologous chromosomes D. division of two cells into four haploid cells
Nematocysts are used for ____.
A. reproduction B. excretion C. muscle action D. circulation E. capturing prey