Phenotypic similarities that provide no information about shared ancestry are called
a. homologies.
b. homoplasies.
c. morphological.
d. anatomical.
e. mosaic characters.
B
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A mineral is considered to be a trace mineral if a normal person requires how much in their diet per day?
A) <1mg B) <1 microgram C) <100 mg D) >100 mg
At the start of the breeding season, male stickleback fish undergo a number of significant changes
Their bellies become bright red and they become aggressive toward other males of the species, establishing and defending territories in which they build their nests. Although most male-male encounters consist solely of the resident lunging at an intruder, if this fails to drive off the intruder, the resident may bite. Females choose to mate with males that have large territories and well-constructed nests. What would you expect to happen as nest sites become scarcer? A) The incidence of biting and other aggressive behaviors will increase. B) Females will begin to choose mates that have no territories. C) The color of the males will fade. D) Nest construction will deteriorate. E) Males will make their territories even larger.
A scientist is using a microarray containing all the genes of a single species. What is the scientist likely to be using this microarray for?
A. gene expression analysis B. investigating a microbial community C. diagnosis of infectious disease D. determining the genetic sequence E. creating a clone library
Giants usually have poor health because they often have diabetes mellitus.
Answer the following statement true (T) or false (F)