Which of the following statements regarding fins on fishes is true?
A) Fins evolved so that fish could swim better.
B) Fins came about because animals couldn't live in water without them.
C) Fins are an adaptation that aid in swimming.
D) Fins resulted from a mutation caused by a movement from land to water.
Answer: C
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An 8-month-old female infant is admitted to the emergency department in respiratory distress on Christmas Eve. A nasopharyngeal aspirate is obtained and sent to the laboratory on ice for analy-sis. The most probable organism that would be isolated is:
a. varicella-zoster virus. b. respiratory syncytial virus (RSV). c. rotavirus. d. coxsackievirus.
The indirect immunosorbent assay detects antibodies rather than antigens.
Answer the following statement true (T) or false (F)
With exponential growth, ____
a. r is always greater than zero b. growth occurs although r can be zero c. the number of new individuals added increases each generation, and r is stable and less than one d. the number of new individuals added increases each generation, and r is stable and greater than one e. the number of new individuals added increases each generation and r increases
Chromosomes are visible only
a. as chromatin. b. during cell division. c. in eukaryotic cells. d. within the nucleolus. e. through the use of transmission electron microscopy.