A CO2 gradient between the inside and outside of a leaf is maintained during photosynthesis because
A) energy is expended by the plant to maintain the CO2 gradient.
B) the CO2 concentration outside of the leaf is always increasing.
C) the CO2 concentration in the mesophyll is constantly decreasing.
D) the stomata close whenever more CO2 is needed.
C
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While examining the sequence of nucleotides in the replicon region of bacterial DNA, you note an abundance of adenine and thymine base pairs. This leads you to conclude that this particular section of the DNA must be the
A. oriC site. B. ter site. C. Shine-Delgarno sequence. D. Pribnow box.
Which hormone sets the body's basal metabolic rate?
A. estrogen B. insulin C. norepinephrine D. cortisol E. thyroxin
Which of the following is NOT involved in some
way in the body’s first line of defense? a. urination b. diarrhea c. gastric juice d. complement e. ciliated cells
Explain how and why immersion oil increases resolution but not magnification when using the 100X objective.
What will be an ideal response?