As cells enter mitosis, their microtubules disassemble and then reassemble forming the mitotic spindle with a focus at the ________, a special animal cell microtubule-organizing structure.
a) kinetochore
b) centromere
c) centrosome
d) kinetosome
e) chromosome
Ans: c) centrosome
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What is the main difference between an ecosystem and a community?
A. A community and an ecosystem are the same thing in eology B. A community consists of nonliving components, while an ecosystem consists of living organisms C. A community consists of both living organisms and their nonliving environment, while an ecosystem consists of nonliving components only D. A community consists of living organisms only, while an ecosystem consists of both living organisms and their nonliving environment
The division of microbes termed the Firmicutes have a cell wall type best described as ________.
A. gram-negative B. gram-positive C. archaeal D. lacking a cell wall
You have discovered a new organism that displays bilateral symmetry during its larval stage, radial symmetry as an adult, develops three germ layers during embryonic development, and forms a mouth opposite the blastopore. Which classification for this organism is most likely?
a. Ctenophora b. Placozoa c. Echinodermata d. Cnidaria
Of the following choices, which could be used in the treatment of a patient in order to determine the patient's cancer subtype?
A. Microarray analysis B. Western Blot analysis C. Oryza sativa D. PCR E. Transformation