Ureaplasma urealyticum generates an electrochemical gradient, despite the absence of an electron transport chain, by synthesizing urea from ammonia/ammonium to generate chemiosmotic potentials.
Answer the following statement true (T) or false (F)
False
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What are advantages of root meristems originating at the pericycle, rather than at other root structures (e.g., the epidermis)? Select all correct choices
A. New roots form only at the tips of preexisting roots, reaching deep water sources. B. New roots are directly connected to the xylem and phloem of pre-existing roots. C. New roots form outside of the Casparian strip and can absorb more nutrients. D. New roots can sprout from any location (i.e., not just nodes) on pre-existing roots.
A species of trilobite was found in the fossil record. At its first appearance, it is similar to an ancestor species but differs from the ancestor in several key characteristics. It seems to change little over several million years, then is extinct. This illustrates the concept of
A. punctuated equilibrium. B. gradualism. C. developmental evolution. D. anagenesis. E. evo-devo.
Activated B cells divide to form plasma cells and memory B cells, both of which are short-lived and secrete copious
amounts of antibody molecules into the bloodstream. a. True b. False
A network of ________, a "fourth cytoskeleton" is involved in pinching off yeast daughter cells
Fill in the blank with correct word.