41. One threat to kelp forests is ____.? a. ?polluted water running off the land
ID: 218086 • Letter: 4
Question
41. One threat to kelp forests is ____.?
a.
?polluted water running off the land and into coastal waters
b.
?soil erosion
c.
?human consumption
d.
?increasing forest fires
e.
?growing populations of sharks
42. Old-growth forests are also known as ____.?
a.
?tree farms
b.
?strip forests
c.
?succession forests
d.
?primary forests
e.
?second-growth forests
43. Which statement best describes an organism's habitat??
a.
?place or type of ecosystem in which a species lives
b.
?types of competitors
c.
?range of tolerance to different physical and chemical conditions
d.
?types of resource requirements
e.
?nutrient relationships with other species
44. During El Niño conditions, ____.?
a.
?ocean currents accelerate in the Pacific Ocean, bringing warmer weather to Japan
b.
?the thermocline throughout the Pacific Ocean deepens
c.
?the thermocline in the eastern Pacific Ocean deepens, disrupting upwelling
d.
?the thermocline in the central Atlantic Ocean rises, bringing cold, deep water to the surface
e.
?ocean currents slow in the Atlantic Ocean, bringing cooler weather to Europe
Indicate whether the statement is true or false.
45. ?Generalist species are more prone to extinction when environmental changes change rapidly than specialist species.
a.
True
b.
False
Indicate the answer choice that best completes the statement or answers the question.
46. Factors that act to limit the growth of populations are collectively called ____.?
a.
?environmental resistance
b.
?death
c.
?emigration
d.
?environmental capacity
e.
?carrying capacity
Indicate whether the statement is true or false.
47. ?The biological diversity of the earth is only a function of the number of species on the earth.
a.
True
b.
False
Indicate the answer choice that best completes the statement or answers the question.
48. The equator is warmer than the poles because ____.?
a.
?polar ice sheets cool the atmosphere
b.
?the Coriolis effect pulls cold air north and south
c.
?the sun exerts a gravitational pull on the warm air
d.
?cooler air is less dense
e.
?the sun’s rays strike directly at the equator
41. One threat to kelp forests is ____.?
a.
?polluted water running off the land and into coastal waters
b.
?soil erosion
c.
?human consumption
d.
?increasing forest fires
e.
?growing populations of sharks
Explanation / Answer
41. The answer is a. polluted water running off the land and into coastal waters.
Explanation
The water pollution includes pesticides, herbicides as well as fertilizers present in runoff water kill kelp plants and fertilizers help algae grow which block the sunlight and avoids the growth of kelp.
42. The answer is d. Primary forest.
Explanation
An old growth forest is also termed as primary forest, virgin forest, primeval forest, late several forest or ancient woodland.
It is A forest which has attained great age without significant disturbance. So, it exhibits unique ecological features and might be classified as a climax community.
43. The answer is a. Place or type of ecosystem in which organism lives.
Explanation
The ecosystem is the natural habitat in which organisms live. This is where the basic needs of the organisms to survive such as food, water and shelter from the weather are met. It is a place where they breed their young.
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