What step did Mendel take to be sure that his pea plants did not self-pollinate? .
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Which type of genetic factor can hide or mask another genetic factor?
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When a plant self-pollinates and all offspring have the same trait as the parent, it is called.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?