Which one of the following examples describes a communication mode that would be best for signaling over the greatest distance in a dark, densely forested environment?
A. Flashing of a male firefly to attract conspecific females
B. Pheromones released by a female moth
C. Waggle dance of a honeybee in a colony within the forest
D. Territorial song of a male bird to repel other males
E. Display of plumage of a male bird to attract females
Answer: D
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Gymnosperms include plants that demonstrate which of the following characteristics? Select all correct choices
A. flesh-covered seeds B. double fertilization C. pollen-containing cones D. vascular cambia E. photosynthetic stems F. multicellular xylem vessels
Answer the question using the accompanying figure. The figure shows the alleles present at an STR locus in two
adults and four juveniles. Which of the juvenile(s) could be offspring of the adults?
a. juvenile 2 only b. juveniles 2 and 3 c. juveniles 1 and 4 d. juveniles 2 and 4 e. juveniles 1, 2, 3, and 4
Symptoms of cryptosporidiosis include
A. chills, fever, and sweats. B. bloody, mucus-filled stools and fever. C. a red skin papule that spreads to a large ulcer. D. headache, sweats, vomiting, severe abdominal cramps, and diarrhea.
What structures of the male and female reproductive systems share a common embryonic origin?
A. cervix and ejaculatory duct B. labia minora and penis C. clitoris and scrotum D. clitoris and penis