Answer the following statements true (T) or false (F)
1.On the island of Guam, a single type of nonnative organism, the black-footed ferret, is responsible for the disappearance of at least 12 species of birds and small reptiles from the island.
2.Immigration is the migration out of a particular area.
3.Emigration is the migration out of a particular area.
4.When exponential growth is plotted over time, an S-shaped curve emerges.
5.When logistic growth is plotted over time, a J-shaped curve emerges.
1.FALSE
2.FALSE
3.TRUE
4.FALSE
5.FALSE
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Which restriction enzyme leaves blunt ends?
A) XbaI B) SmaI C) EcoR1 D) BamHI E) All of these
The idea that several species in a community have functionally equivalent roles but vary in their ability to withstand environmental stressors is called the ________ hypothesis
A) redundancy B) biocapacity C) unextinction D) rivet E) multiple species
Purine or pyrimidine analogs:
A) act as antimetabolites B) inhibit ribosome function C) disrupt cell membrane function D) inhibit cell wall function
What nutrient most commonly contributes to eutrophication?
A. phosphorus B. nitrite C. sulfide D. methane E. iron oxides