Fertilizers increase plant growth by providing:
What will be an ideal response?
Nitrogen that can be taken up by plants
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A hypertonic environment would be ideal for a healthy plant
Indicate whether the statement is true or false.
Large or polar hormones cannot enter a cell directly. Which of the following molecules can act as a second messenger for such hormones?
A. catecholamine B. cyclic AMP C. epinephrine D. norepinephrine E. calcitonin
Recessive disorders related to genes found on the X chromosome but not on the Y are more commonly expressed in ________
A) children B) adults C) females D) males
During photosynthesis, which step is most responsible for a plant's acquisition of new organic material?
a) the "building" of NADPH during the Calvin cycle b) the excitation of chlorophyll molecules by photons of light c) the "plucking" of carbon atoms from the air and fixing of the carbons to the organic molecules within the chloroplast d) the loss of water through evaporation e) ATP made during the light reactions