Some women suffer from severe cramps during their menstrual cycles, requiring medical attention. This is a condition called dysmenorrhea. Based on your knowledge of the female reproductive tract, which structure most likely causes this condition?
A) vagina
B) cervix
C) uterus
D) labia majora
C
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Genes that are close together in the same chromosome:
A. tend to assort independently. B. tend to be transmitted together. C. assort primarily independently, but will, very rarely, be transmitted together. D. are present only on X chromosomes. E. tend to be transmitted together, and are present only on X chromosomes.
The distinctive mating signals that have evolved as part of an animal's courtship illustrate what type of reproductive
isolating mechanism? a. gametic isolation
b. temporal isolation c. behavioral isolation d. mechanical isolation e. communicative isolation
Populations of amphibians, including frogs and toads, have been plagued by disease and high rates of deformity. A recent study investigated whether problems among the populations have arisen due to poisons from chemicals associated with agriculture. Biologists from the University of Florida collected local adult cane toads (Bufo marinus) from more than 20 different locations. Toads were collected from areas close to agriculture; both large-scale and small-scale farms as well as from suburbs. At collection sites where 50-97% of the adjacent land was farmed, males showed high levels of feminization. Feminized male toads were similar in color to females and had lower levels of testosterone and often also deformed gonads. These changes can lead to sterile males or changes in behavior that
prevent mating from occurring. At the end of their study, scientists stated that they had supported their theory that agricultural chemical cause deformities. a. true b. false
Sweat glands produce (lysozyme/dermacidin/acid), which destroys the cell wall of bacteria by cleaving the bonds between the sugar subunits
What will be an ideal response?