Methanogens are classified as ____
a. Crenarchaeota only
b. Euryarchaeota only
c. Korarchaeota
d. Nanoarchaeota
e. both Crenarchaeota and Euryarchaeota
ANSWER: b
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Answer the following statements true (T) or false (F)
1. r-selected species tend to have type III survivorship curves. 2. Drought and floods are considered to be density-dependent factors potentially affecting population size. 3. In a demographic transition, death rates decline before birth rates. 4. Worldwide human population growth has been exponential since the Industrial Revolution.
Rubulavirus falls under which group of the ICTV nomenclature system?
A. Subfamily B. Family C. Genus D. Order
Which of the following results if reproduction occurs
early in the life cycle? a. Population growth rate increases. b. Population size declines. c. Population size is not affected. d. Generation time increases. e. Growth rate remains unchanged.
The focus of gene regulation in multicellular organisms is on:
a. operons. b. the specificity of products in different tissues. c. economizing resources at all levels. d. rapid turnover of RNA molecules. e. controlling the transcription of genes involved in resource use