Which group was first to have an amniotic egg?
a. birds
b. reptiles
c. amphibians
d. bony fishes
e. mammals
ANSWER: b
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The central nervous system is lacking in animals that have _____
A) a complete gut B) bilateral symmetry C) radial symmetry D) a closed circulatory system E) excitable membranes
ws; ws; ws+; ws+; ws; ws; ws+; ws+
In Neurospora, the white-spore allele (ws) results in white spores rather than the wild-type black spores. Diploid ws / ws+ cells undergo meiosis followed by one round of mitosis to form ordered tetrads. Indicate if the pattern of spores seen in the tetrads are consistent with first-division or second-division segregation. A) first-division segregation pattern B) second-division segregation pattern
The genetic information in a chromosome is enclosed in the nucleotides sequence of the molecule
a. true b. false
You see an advertisement on the television with a very good looking person showing off a new, shiny,
powerful car. You seriously think about buying that particular car. Therefore, the person in the advertisement could best be described as the:a. sign stimulus. b. operant conditioner. c. imprinter. d. classic conditioner. e. negative reinforcer