The preferred fixative for the technique shown in Image B is:
a) 10% buffered formalin
b) Carnoy solution
c) Absolute alcohol
d) B-5 solution
Answer: a) 10% buffered formalin
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What is the current concentration of carbon dioxide in the atmosphere?
A. 100 parts per million B. 140 parts per million C. 42 parts per thousand D. 380 parts per million E. 1150 parts per million
Large pressure gradients arise in sieve tube systems by means of:
a. evaporation b. tension c. osmosis d. transpiration e. cohesion
One idea to mitigate the effects of burning fossil fuels on atmospheric CO2 concentrations is to pipe liquid CO2 into the ocean at depths of 2500 feet or greater. At the high pressures at such depths, CO2 is heavier than water
What potential effects might result from implementing such a scheme? A) increased carbonate concentrations in the deep waters B) increased growth of corals from a change in the carbonate–bicarbonate equilibrium C) no effect because carbon dioxide is not soluble in water D) increased acidity and decreased carbonate concentrations in the deep waters
Which species is an invasive species?
A) pika in the western United States B) brown tree snake in Guam C) polar bear in Norway D) brown pelican off the coast of Louisiana