Ultraviolet light can cause the potentially deadly skin disease
A) Skin cancer
B) Carbon footprint
C) Age structure
D) Emigration
E) Desertification
F) Chlorofluorocarbon
G) Ozone
H) Carrying capacity
I) Density-dependent
J) Death rate
A) Skin cancer
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Substance B is synthesized in neurons, travels through gap junctions, and triggers the transduction of an
electrochemical signal. This is an example of ____.
a. autocrine signaling b. paracrine signaling c. long-distance signaling d. local signaling e. communication by direct contact
Alzheimer disease has been shown to be related to_______
a. alcoholic fermentation in the brain d. decreased brain metabolism b. lactate fermentation in the brain e. increased mitochondrial enzyme activity c. increased brain metabolism
A nutritionist has an enclosed cabinet used to calculate the calories in foods. The protocol requires that the food is set on fire as fuel under a water tank and then the temperature change in the water is equated to the calorie content in the foods. High calorie foods burn better than low calorie foods. Why?
a. High calorie foods have less water than low calorie foods and water cools the heat transfer reaction during combustion. b. The third law of thermodynamics states that change of state reactions like combustion will result in decreased entropy. c. Burning the foods is an energy transformation. The second law of thermodynamics says that no energy transformation is 100% efficient. Some of the energy is usually lost to the surroundings as heat. d. The oxygen given off by high calorie foods is extremely combustible and that is what generates the heat. Foods that are burned have fewer calories after the protocol.
Four of the five ecosystems below are related by the
same type of biome. Select the exception. a. short-grass prairie b. monsoon grassland c. savanna d. chaparral e. tallgrass prairie