Why don't many successions reach the climax community status?
A. because the species within the system don't interact constantly
B. because species go extinct
C. because animals always die
D. because the local climate keeps changing and human activities have an impact
Answer: D
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A newly described fungal species has been isolated from the rumen of sheep. It is microscopic, unicellular, and produces spores that have a flagellum. This species will most likely be classified as a/an ________.
A. Chytridomycete B. Glomerulomycete C. Ascomycete D. Microsporidia E. Basidiomycete
The main purpose of fermentation reactions is to
a. produce ATP. b. regenerate the electron carriers needed for glycolysis. c. produce the building blocks for biological molecules. d. prepare the pyruvate for the Krebs cycle. e. provide various products useful for man.
Parasites always complete their life cycle in a single host species
Indicate whether the statement is true or false
The genomes of ________ cannot function as mRNA and therefore these viruses must bring at least one RNA-dependent RNA polymerase into the host cell during entry.
A. double-stranded DNA viruses B. single-stranded DNA viruses C. positive-strand RNA viruses D. negative-strand RNA viruses