Teichoic acids are commonly found in gram-negative cell walls
Indicate whether the statement is true or false.
Answer: FALSE
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The older fossils are typically found in the ________ sediments.
A. finer B. lower C. upper D. coarser
In non-cyclic photophosphorylation, where do electrons go after being released from photosystem II?
1.through an electron transport chain and into photosystem I 2.into photosystem I, through an electron transport chain, and then into NADPH 3.back into water 4.back into photosystem II
In the section "Investigating Life: Birds Do, Bees Do It", bumblebees pollinated M. lewisii, whereas hummingbirds preferred the red-flowered M. cardinalis. If a hummingbird carries M. cardinalis pollen to M. lewisii, the resulting hybrid offspring are viable. M. lewisii and M. cardinalis are different species because of
A. post-zygotic barriers to reproduction. B. pre-zygotic barriers to reproduction. C. punctuated equilibrium. D. gradualism. E. asexual reproduction.
If the curve shifts to the left or to the right, there is no gene flow, and the population size consequently increases over successive generations, then which of these is (are) probably occurring?
1. immigration or emigration 2. directional selection 3. adaptation 4. genetic drift 5. disruptive selection A) 1 only B) 4 only C) 2 and 3 D) 4 and 5 E) 1, 2, and 3