Which property of water provides the cooling effect of sweating?
Cohesiveness
High heat capacity
High heat of vaporization
Surface tension
High heat of vaporization
Explanation:
Water has a high heat of evaporation, meaning that it takes a lot of energy to cause water to evaporate. Therefore, water molecules that evaporate carry away a lot of heat, cooling the surface they leave behind.
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Match the following items with the correct phrases.
_______1. In the nitrogen cycle, bacteria called ____________________ convert atmospheric nitrogen gas into ammonia in the soil. _______2. ____________________ live in the root nodules of legumes such as alfalfa and clover. _______3. ____________________ are capable of converting the nitrogen within a dead plant or animal into ammonia in the soil. _______4. In the nitrogen cycle, soil organisms called ____________________ convert ammonia into nitrites, and nitrites into nitrates. _______5. In the nitrogen cycle, soil organisms called ____________________ convert the nitrogen in nitrates to nitrogen gas in the atmosphere. a. cyanobacteria b. denitrifying bacteria c. nitrifying bacteria d. nitrogen-fixing bacteria e. saprophytes
Identify the point in time during an action potential when a positive feedback process is occurring in a neuron.
A. when the neuron is at rest B. as the neuron is being depolarized and passes the threshold potential C. after the peak depolarization of the action potential when it is rapidly repolarizing D. during the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential E. A positive feedback process is occurring at all the time points given.
Where in cells are proteins manufactured?
a. Golgi bodies b. vesicles c. rough endoplasmic reticula d. lysosomes e. smooth endoplasmic reticula
Implantation of an embryo normally has occurred by how long after fertilization?
A. 3 days B. 6 days C. 12 days D. 20 days E. 1 month