During contraction
a. cross bridges of muscle filaments are broken and reformed.
b. ATP is released as a biproduct from cross-bridges.
c. muscle cells use phosphate as their energy source.
d. if there is an abundant supply of oxygen, glycogen depletion by glycolysis will lead to
fatigue.
e. calcium is linked to the myosin head.
A
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Traditional and molecular phylogenies disagree on which one of the following issues?
A. whether or not the Eumetazoa are monophyletic. B. whether the Bilateria and Radiata split early into separate monophyletic clades. C. whether the split between Parazoa and Eumetazoa occurred at a very early stage in animal evolution. D. whether Echinodermata and Chordata are both deuterostomes. E. whether the appearance and type of coelom is important in interpreting phylogeny.
What are the vasa recta?
a. looped extensions of the afferent arterioles b. looped extensions of the efferent arterioles c. regions of the renal tubule d. vessels that supply blood to the glomerulus e. vessels that supply blood to the proximal convoluted tubule
How can it be determined whether a mutant that constitutively expresses the lac genes has a mutation that inactivates the repressor or a mutation in the operator?
What will be an ideal response?
If one was attempting to estimate the parameter, b, that best explains the relationship between Sales and price using the following equation Sales = (Price - b)2. Which of the following methods would be the most appropriate to estimate b?
A. Nonlinear regression B. Simple linear regression C. Multiple linear regression D. Probit