Who proposed that the structure of DNA is a double helix with two polynucleotide chains running in opposite directions and held together by hydrogen bonding between pairs of nitrogenous bases?
A. Hershey and Chase
B. Chargaff
C. Franklin
D. Watson and Crick
E. Meselson and Stahl
D. Watson and Crick
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Bacteria that are capable of oxidizing both iron and sulfur usually have a strong preference for sulfur oxidation because it yields more energy
Indicate whether the statement is true or false.
A sensory communication pathway involves
a. reception of stimulus energy. b. transduction of stimulus energy to electrochemical energy. c. action potentials traveling along a nerve pathway to the brain. d. brain response leading to sensation and/or perception. e. all of these.
Predict the microscopic appearance of cells in the leaf tissue of a wilted plant.
What will be an ideal response?
All vertebrate forelimbs are the same in that they are used for the same form of locomotion.
Answer the following statement true (T) or false (F)