A 25-year-old woman has just had the Implanon or Nexplanon system inserted for contraception. Six months later, she is concerned because she is not menstruating. This is ________, and the reason is that she has an increased level of ________
A) abnormal; luteinizing hormone (LH)
B) normal; progesterone
C) normal; estrogen
D) abnormal; follicle stimulating hormone (FSH)
B
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In the equation, C6H12O6 + 6O2 ? 6CO2 + 6H2O, ATP and heat would be on which side of the reaction?
A. The products because this is an exergonic reaction. B. The reactants because this is an endergonic reaction. C. It could appear on either side because this reaction is in equilibrium. D. The reactants because this is an exergonic reaction. E. The products because this is an endergonic reaction.
The presence of branched membrane lipids with ether linkages is a characteristic of ____
a. Archaea only b. Bacteria only c. both Archaea and Bacteria d. of neither Archaea nor Bacteria e. Archaea, Bacteria and Eukarya
Mycorrhizae
a. increase plant growth. b. are symbionts. c. concentrate nutrients they then share with plants. d. increase the surface area for absorption. e. are described by all of these.
A sensory communication pathway involves
a. reception of stimulus energy. b. transduction of stimulus energy to electrochemical energy. c. action potentials traveling along a nerve pathway to the brain. d. brain response leading to sensation and/or perception. e. all of these.