Why does sweating cool your skin on a hot, dry day but make you feel warmer on a hot, humid day?
What will be an ideal response?
Evaporating sweat cools the skin as the water and the heat it has absorbed move from the skin to the drier air. Sweat does not evaporate as well on a humid day, tending instead to build up on the skin, insulating the body rather than cooling it.
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Which is the correct horizontal pathway of water from the soil to the center of the root?
a. epidermis ? root hair ? cortex ? pericycle ? endodermis ? xylem b. epidermis ? cortex ? pericycle ? endodermis ? phloem ? xylem c. root hair ? epidermis ? cortex ? endodermis ? pericycle ? xylem d. root hair ? cortex ? endodermis ? pericycle ? epidermis ? xylem e. root hair ? epidermis ? endodermis ? cortex ? xylem ? phloem
Compare and contrast the nuclear envelope and the plasma membrane.
a. The nuclear envelope consists of two concentric phospholipid bilayers while the plasma membrane is only one phospholipid bilayer. Both membranes are selectively permeable and have pores. b. The nuclear envelope consists of two concentric phospholipid bilayers while the plasma membrane is only one phospholipid bilayer. Neither membrane is selectively permeable or has pores. c. Both membranes consist of two concentric phospholipid bilayers, are selectively permeable, and have pores. d. Both membranes consist of two concentric phospholipid bilayers and neither is selectively permeable or has pores.
The ?-helix and ?-pleated sheet are examples of which level of protein structure?
A. primary B. secondary C. tertiary D. quaternary
Heavy metal and oxidizing agent disinfectants damage (DNA/enzymes/membranes), interfering with microbial metabolism.
Fill in the blank(s) with the appropriate word(s).