How do the nervous systems of cnidarians and arthropods differ?
What will be an ideal response?
ANSWER: Cnidarians have a nerve net, which threads through two tissue layers and coordinates
responses to stimuli. However, there is no central control organ or brain. Arthropods have a
highly organized central nervous system, which coordinates responses through three tissue
layers.
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Beadle and Tatum discovered that metabolic pathways are studied most effectively using which of the following techniques?
A) creating multiple gene mutations resulting in nonfunctional enzymes specific to a metabolic pathway B) adding intermediates to a metabolic pathway C) removing all intermediates of a metabolic pathway D) creating single gene mutations resulting in nonfunctional enzymes specific to a metabolic pathway
The regulation of protein function is called ______
A. posttranslational regulation B. transcriptional regulation C. translational regulation D. posttranscriptional regulation
Bakers use alcoholic fermentation to produce
__________ which causes the dough to rise. c. alcohol d. ATP c. butyric acid d. carbon dioxide e. none of these
In which group did the amniote egg first evolve?
a. amphibians b. birds c. reptiles d. mammals e. frogs