A digestive system involving a(n) tube-within-a-tube is characteristic of Cnidarians. Indicate whether the statement is true or false
False - gastrovascular cavity
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Angiosperm-dominated tropical rainforests were very similar to the gymnosperm-dominated forests that preceded them
A. true B. false
You discover a new type of marine organism that has the kidneys of a fish but no gills. What affect would the absence of gills have on excretion of nitrogenous waste?
A. No affect. Fish kidneys excrete all nitrogenous waste. B. Nitrogenous excretion decreases because no nitrogen uptake is occurring at the gills. C. Nitrogenous excretion increases at the kidneys because it cannot be lost at the gills. D. No affect. Nitrogenous wastes diffuse across the skin.
Which of the following can reduce the level of genetic diversity?
1.gene flow 2.sexual selection 3.polyploidy speciation 4.genetic drift
Most precipitation reaching land results from
A) evaporation of surface water over land. B) upwelling of freshwater. C) atmospheric synthesis of water. D) evaporation of water from oceans. E) evaporation of water from plants during photosynthesis.