The accompanying sketch depicts a cell from an organism in which 2n = 2 and each chromosome is metacentric
(a) Circle the correct stage for the cell in this sketch:
anaphase of mitosis
anaphase of meiosis I
anaphase of meiosis II
telophase of mitosis
(b) Given that each G1 nucleus from this organism contains 16 picograms of DNA, how many picograms of chromosomal DNA would you expect in the cell shown here?
(a) anaphase of meiosis II
(b) 16
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During the process of gel electrophoresis, the DNA fragments migrate due to the effects of ____
a. gravity b. vibrations c. electrical charge d. magnetic attraction e. centrifugal force
Earthworms have a mouth and an anus, but they also excrete liquid wastes. Through which of the following structures do they secrete nitrogenous and other wastes?
a. exosome b. tube cell c. nephridiopore d. Malpighian tubules
Where would you find Ephemeroptera (Mayflies)?
a. Near water b. In trees c. In leaf litter d. Under stones
What is a swim bladder?
A) a gas-filled organ to help with buoyancy B) sensory organ C) structure that contains helium qualities D) senses vibrations