A wild duck needs a steady supply of energy to be able to fly for hours. Domesticated chickens rarely fly. As a result, you would expect to find in the breast muscles of wild ducks than in domesticated chickens.
A. less cytoplasm
B. more Golgi apparatus
C. fewer mitochondria
D. more mitochondria
E. more cytoplasm
D. more mitochondria
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Like most birds, what nonbird reptiles are highly vocal and engage in complex parental behavior?
a. crocodilians b. turtles c. lizards d. snakes e. amphibians
Most innate immune responses rely on
A. IgM antibodies. B. recognition of specific antigens. C. plasma cells to secrete antibodies. D. pathogens being engulfed and destroyed. E. clonal selection to replicate specific lymphocytes.
The original differentiation of prokaryotes and eukaryotes was based on structures found in prokaryotes that are lacking in eukaryotes.
Answer the following statement true (T) or false (F)
Which of the following statements about RNA interference (or RNAi) is false?
(a) RNAi is a natural mechanism used to regulate genes. (b) During the process of RNAi, hybridization of a small RNA molecule with the mRNA degrades the mRNA. (c) Because RNAi depends on the introduction of a double-stranded RNA into a cell or an organism, it is not a process that can cause heritable changes in gene expression. (d) In C. elegans, RNAi can be introduced into the animals by feeding them with bacteria that produce the inhibitory RNA molecules.