Which of the following is a biotic population control mechanism?
A. Precipitation
B. Day length
C. Nutrients
D. Pathogens
E. Climate
Answer: D
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It is predicted by demographers that how many people will live in the North American Region by the year 2050?
A) 423 million B) 270 million C) 323.9 million D) 41 million E) 464 million
Which of the following might best help grasses in a lawn that have been growing in a soil that has a high percentage of clay?
A) Adding fertilizer in the spring and fall B) Adding lime in the spring to neutralize the pH of the soil C) Aerating the lawn by removing small plugs of soil D) Watering the lawn about an inch of water every other day
Mountains are a geographical feature found in many biomes. The rain shadow effect is where ________
A) the wet region is determined by the location of jet stream B) rainfall fluctuates, arriving in equal amounts on both sides C) the dry region is on the leeward side of the mountain D) rainfall fluctuates, but always falls in shadow areas E) the wet region is on the leeward side of the mountain
What is the tenacity of a mineral, and how can it be described?
a. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming, although the deformation always reverts to the original shape of the mineral. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. b. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as brittle, elastic, malleable, or sectile. c. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. d. Tenacity is the mineral's crystal's ability to stay attached to other crystals. It can be described as tenacious, very tenacious, or not tenacious. e. Tenacity describes how easily a mineral crystal can be separated from other crystals and is described as brittle, elastic, malleable, or sectile.