Photosynthesis enables plants to capture the energy from sunlight. In this essential process, plants incorporate the carbon from CO2 into high-energy __________ molecules, which the plant cell mitochondria use to produce ATP
(a) fat
(b) sugar
(c) protein
(d) fiber
(b)
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Essentially all exchange of gases and other materials between the circulatory system and tissues of the body or the outside world (e.g., in the lungs) occurs in the
A. capillaries. B. arteries. C. veins. D. heart. E. lymphatic system.
Hyphae that contain two genetically distinct, sexually compatible nuclei within
each cell are described as: a. twins. b. couplets. c. dikaryotic. d. polykaryotic. e. double hyphae.
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Figure 34.5
What is the most likely cause of the excessive growth exhibited by the person in the center of the accompanying figure?
A. Pituitary tumor B. Lack of GH receptor response C. Low levels of rhGH D. Cretinism E. Laron syndrome
According to the biological species concept, speciation consists of the evolution of biological barriers to gene flow. The most important distinction is between _______ and _______ barriers.
A. male; female B. sexual selection; natural selection C. temporal; spatial D. ecological; evolutionary E. prezygotic; postzygotic