What would be the expected effect on plants if the atmospheric CO2 concentration was doubled?
A) All plants would experience increased rates of photosynthesis.
B) C3 plants would have faster growth; C4 plants would be minimally affected.
C) C4 plants would have faster growth; C3 plants would be minimally affected.
D) C3 plants would have faster growth; C4 plants would have slower growth.
B
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The dead brown spots on these leaves
are sites where a pathogen invaded and triggered the defensive destruction of surrounding cells. This is an example of which type of defense?
1.activation of heat-shock proteins 2.increased production of terpenes 3.systemic acquired resistance 4.the hypersensitive responseYou suspect a 100-nm structure is present in a cell. Which of the following provides the lowest magnification that you can use to see this structure?
a. Transmission electron microscope b. Phase-contrast microscope c. Scanning electron microscope d. Brightfield microscope e. Darkfield microscope
Diseases that are induced by modern medical procedures are referred to as ________ infections
A) iatrogenic B) exogenous C) opportunistic D) endogenous E) subacute
Mitochondria also contain DNA.
Answer the following statement true (T) or false (F)