Researchers in Alaska were interested in increasing the sockeye salmon (Oncorhynchus nerka) population in three coastal lakes. To accomplish this, the ponds were treated with fertilizers. As a result, zooplankton biomass increased between 40% and 700% in the three lakes. The substantial growth in zooplankton would suggest that prior to these experiments, these lakes were __________________.
A. eutrophic
B. stratified
C. subject to low light levels
D. oligotrophic
D. oligotrophic
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Answer the following statement true (T) or false (F)
If alcohol is taken on a full stomach, the rate at which the BAC increases is (slower/higher) than when alcohol is taken on an empty stomach.
What will be an ideal response?
Homo erectus has been shown to have dispersed from
A. South America. B. Asia. C. North America. D. Africa. E. Europe.
HIV spikes attach to CD4+ receptors found on
A) T helper cells. B) macrophages. C) dendritic cells. D) T helper cells and macrophages. E) T helper cells, macrophages, and dendritic cells.