Which type of graded potential moves the cell closer to having an action potential?
a. EPSP
b. IPSP
c. inhibitory potential
d. hyperpolarization
e. potentials that move the cell away from threshold
ANSWER: a
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Which feature is not consistent with animals?
a. Heterotrophs b. Single celled c. Ingest food d. Unwalled cells in their bodies e. Motile during some point in their life
Which of the following statements belongs in the Introduction of a scientific paper?
A. Intruder crickets were marked on the thorax with a paint pen in order to distinguish them from the resident crickets. B. It is predicted that males that have been residents in an artificial territory for several days will win pairwise contests more often than will intruders. C. The null hypothesis for the statistical test was that wins would be no more likely for residents than they would be for intruders (50:50). D. A p-value of 0.05 or less for the statistical test was considered sufficient evidence to reject the null hypothesis.
The five-carbon sugar in DNA nucleotides is called RIBOSE.
a. true b. false
The water pressure gradient in phloem tubes is formed by the
A) leaves being higher than the roots, which means that gravity creates pressure. B) diffusion of water from one sieve-tube cell to the next. C) loading of sugars into phloem at sources and removal of sugars at sinks. D) active transport of water from sugar sources to sugar sinks.