A salmon follows a scent trail upstream to find its way back to the stream where it hatched. What type of sensory receptor cell would it use?
A) thermoreceptors
B) mechanoreceptors
C) chemoreceptors
D) electroreceptors
E) nociceptors
Answer: C
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What is the name of the enzyme that adds CCA to the 3' end of tRNAs?
A. tRNA nucleotidyltransferase B. Aminoacyl-tRNA synthetase C. RNA polymerase D. Peptidyl transferase
Coral are capable of both sexual and asexual reproduction
Indicate whether the statement is true or false
Australopithecus was the first hominin to feature which distinguishing characteristic?
a. bipedalism
b. larger brains c. shorter arms d. sexual dimorphism e. facultative bipedalism
You are planning an experiment to find out whether the rate at which water freezes depends on the shape of the container. What is the independent variable?
A.) shape of the container B.) rate at which water freezes C.) amount of water