You place ant traps around the house. You notice after a period of time that the ants do not enter the traps and the
population size is greater than it was originally. This experience would best be explained by:
a. classical conditioning.
b. habituation.
c. proximate cause.
d. innate behavior.
e. operant conditioning
e
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Can pollinator shifts enhance rates of species formation in plants?
A. yes B. no
Over the long term (100 years), fire seems to ______________ species richness
a. decrease b. increase c. have no effect on d. first increase and then decrease
Hemophilia is a genetic disease that has plagued the royal houses of Europe. The disease allele is recessive and X-linked. Queen Victoria was a carrier, and her granddaughter Alexandra married Nicholas II, the last czar of imperial Russia
Alexandra was a carrier for hemophilia; Nicholas was normal. Their son, Alexis, was afflicted with the disease. Alexis and his four sisters were killed in 1917. What genetic traits were possible for the four sisters? A) None of the four sisters carried the hemophilia allele. B) At least one of the sisters was a carrier of the allele. C) All four sisters were carriers of the hemophilia allele. D) At least one of the sisters had hemophilia like Alexis.
All photosynthetic protists ________.
A. carry out anoxygenic photosynthesis using two photosystems B. carry out oxygenic photosynthesis using one photosystem C. carry out oxygenic photosynthesis using two photosystems D. carry out anoxygenic photosynthesis using one photosystem