These lipids have a hydrophobic part and a hydrophilic part
A) triglycerides
B) carotenoids
C) phospholipids
D) steroids
C
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According to the pressure-flow hypothesis of phloem transport, _____
A) solute moves from a high concentration in the source to a lower concentration in the sink B) water is actively transported into the source region of the phloem to create the turgor pressure needed C) the combination of a high turgor pressure in the source and transpiration water loss from the sink moves solutes through phloem conduits D) the formation of starch from sugar in the sink increases the osmotic concentration E) the pressure in the phloem of a root is normally greater than the pressure in the phloem of a leaf
What do scientists believe was the original genetic material able to copy itself without assistance?
A. Proteins B. Carbohydrates C. DNA D. RNA
Which of the following uses plant-derived sugar for fermentation?
a. wood for shelter b. alcoholic beverages c. medicine d. spices
Which statement is NOT generally characteristic of parasites?
a. They are specialists and usually are able to affect only one variety of hosts. b. They inflict serious injury and kill their hosts. c. Some reside inside their hosts, whereas others live outside their hosts. d. Their host may be a plant as well as an animal. e. Plants as well as animals can be parasites.