Additional observations were made on day 21, and no yellow-leaved seedlings were found alive in either dish. This is most likely because
(A) yellow-leaved seedlings were unable to absorb water from the paper towels
(B) taller green-leaved seedlings blocked the light and prevented photosynthesis
(C) yellow-leaved seedlings were unable to convert light energy to chemical energy
(D) a higher rate of respiration in yellow-leaved seedlings depleted their stored nutrients
Ans: (C) yellow-leaved seedlings were unable to convert light energy to chemical energy
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Which of the following is themuscle protein that binds and stores oxygen to maintain aerobic conditions in actively contracting muscle?
A. hemoglobin B. myoglobin C. troponin D. calmodulin
Traditional ways of evaluating multifactorial traits include
A) empiric risk and heritability. B) Punnett squares and pedigrees. C) surveys that ask people what they have been exposed to. D) tests for several Mendelian traits or diseases.
What is the basic structure of most lipids?
A) A glycerol head and up to three fatty acid tails B) A linear chain of individual monomers C) A branched chain of individual monomers D) A chain of fatty acid tails
An activator that does not have an activating domain
a. must directly interact with RNA polymerase. b. must also not have a DNA-binding domain. c. may require a coactivator with an active domain. d. is mutant and cannot activate a gene. e. is called a repressor.