A group of organisms at a particular level in a system of classification is called a(n)
A. category.
B. taxon.
C. outgroup.
D. ingroup.
Answer: B
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In humans, brown adipose tissue is used for ____
a. nitrogenous waste processing b. controlling blood pressure c. nonshivering thermogenesis d. digestion of fats e. cooling the body when exposed
During the 1960’s ecologists emphasized competition as the primary factor structuring communities
Indicate whether the statement is true or false.
Which of the following is one way in which scientists can test hypotheses about events that occurred in the distant past?
A) by dissecting current animal specimens B) by analyzing fossils recovered from the Earth C) by visiting local libraries to research the events D) by interviewing current scientists and researchers
Many algal species have life cycles consisting of alternating haploid and diploid generations. The most
common life cycle in green algae consists of organisms that are
a. unicellular in the haploid stage and multicellular in the diploid stage. b. multicellular in the haploid stage and unicellular in the diploid stage. c. unicellular in both the haploid and diploid stages. d. multicellular in both the haploid and diploid stages. e. colonial in both the haploid and diploid stages.