Which technique would best be used to visualize movement of unlabeled vesicles along microtubules?
A) immunofluorescence microscopy of fixed material
B) live cell fluorescence microscopy
C) computer-enhanced digital video microscopy
D) deep-etch electron microscopy
E) A, B, C, or D would be equally useful.
Answer: C
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Which of the following characters are considered analogous?
Today, all biological research is undertaken with the recognition that ____
a. the views of evolution put forth by Charles Darwin are without error b. all forms of life are unique,havingevolved fromindependentancestors c. all living organisms share the same common ancestor d. the products of evolution are easily predicted e. evolution can be ignored unless the research explicitly examines evolutionary processes
What is one way that acting as a selfish herd can protect members of the herd?
a. Subordinate group members provide food for offspring of dominant members. b. When an animal notices another group member beginning to flee, it will do likewise, producing the "confusion effect.". c. Cooperative hunting allows a group of predators to capture larger or faster prey. d. Members of groups learn tool production skills. e. Group members fend off scavengers.
Transcriptionally active genes show lower levels of DNA methylation compared with transcriptionally inactive genes
Indicate whether the statement is true or false