Assuming a single cross-over event, the completion of meiosis produces ____
a. three daughter cells with parental chromosomes and one daughter cell with a recombinant chromosome
b. four daughter cells with recombinant chromosomes
c. two daughter cells with parental chromosomes and two daughter cells with recombinant chromosomes
d. one daughter cell with parental chromosomes and one cell with recombinant chromosomes
e. two daughter cells, each with recombinant chromosomes
ANSWER: c
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A contraceptive pill that continuously inhibits the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus will _____
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What region of the brain integrates visceral activities, body temperature, and heartbeat?
A. medulla oblongata B. cerebrum C. hypothalamus D. thalamus E. corpus callosum
Malaria is an infectious disease transmitted to humans from a parasite that infects mosquitoes that feed on humans
World health officials have concerns that climate change may impact the transmission of malaria into tropical highland areas in Africa. If these concerns turn out to be valid, they would be evidence for which of the following? A) Global climate change affects the distribution of species. B) Global climate change will negatively impact the transmission of malaria only in Africa. C) Global climate change affects freshwater and marine biomes. D) Global climate change will enable scientists to more easily control the spread of malaria.
Your professor wants you to construct a phylogenetic tree of orchids. She gives you tissue from seven orchid species and one lily. What is the most likely reason she gave you the lily?
A) to serve as an outgroup B) to see if the lily is a cryptic orchid species C) to see if the lily and the orchids show all the same shared derived characters (synapomorphies) D) to demonstrate likely homoplasies