Match the following
27g/L
A) 27g/100ml
B) 27g/1000ml
C) 27g/1,000,000ml
B) 27g/1000ml
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Which of the following statements about muscle contraction is false?
A. Actin and myosin filaments shorten during muscle contraction. B. Sarcomere length is variable in invertebrates, but uniform in vertebrates. C. Longer sarcomeres allow for a greater degree of shortening. D. Actin and myosin filaments overlap more when a muscle is contracted than when it is relaxed. E. Rapidly contracting muscles express myosin molecules that have higher rates of ATP hydrolysis.
Eutrophication describes:
A. the process in which added nutrient levels lead to the growth of algae and cyanobacteria populations. B. the reduction of oxygen in the water as a result of bacterial decomposition. C. the total amount of nitrogen fertilizer that leaves agricultural fields as surface runoff. D. the increased production of crops using fertilizer. E. the death and decomposition of algal blooms.
What situation below is best characterized as interference competition?
A. A barnacle living on the tail of a humpback whale. B. Viruses that infect bird species. C. Cattle and deer grazing on the same grasses. D. Insects that use rabbit warrens for shelter. E. A tiger that excludes other tigers from its territory.
In healthy adult humans, normal systolic pressure is ____ mm Hg and normal diastolic pressure is ____ mm Hg
a. 20 to 50; 5 to 20 b. 60 to 80; 90 to 120 c. 90 to 120; 60 to 80 d. 90 to 120; 130 to 150 e. 130 to 150; 90 to 120