Fungi parasitic on plants produce specialized hyphae, called ____, that penetrate the host
a. asci
b. basidia
c. soredia
d. haustoria
e. secondary mycelia
d
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The measured distance between genes D and E in a two-point testcross is 50 map units. Where are genes D and E in relation to each other? (Select all that apply.)
A) D and E are on different homologous chromosomes. B) D and E are on the same chromosome, at least 50 map units apart. C) D and E are on the same chromosome, exactly 50 map units apart. D) D and E are on the same chromosome, less than 50 map units apart.
Using species names for viruses is controversial since viruses are not considered living organisms, and they change over time so characteristics that may be used for speciation are unstable.
Answer the following statement true (T) or false (F)
Which of the following statements concerning tumor necrosis factors (TNF) is false?
a. TNF can be secreted by macrophages. b. TNF may stimulate the inflammatory response. c. The release of large amounts of TNF brings down a high fever. d. TNF kills cancer cells. e. TNF can be secreted by lymphocytes.
Rationalizing is a _____ form of coping.
A. emotion-focused B. problem-focused C. primary appraisal D. juvenile