Which chemical family is composed almost entirely of man-made elements?
A. the lanthanides
B. the halogens
C. the actinides
D. all of the above
E. none of the above
Answer: C
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A population will decrease as
A. birth rate increases. B. mortality decreases. C. biotic potential increases. D. environmental resistance increases. E. immigration increases
A prairie grass may experience grazing herbivores, wildfires, droughts, deep snow, or blazing hot days in the summer. Yet, those prairie grasses alive today are descendants of those that have survived these challenges and more
From an evolutionary perspective, these sorts of environmental challenges are identified as A) herbivory. B) predation. C) selective pressures. D) reproductive isolation.
Your friend is an avid gardener. She is concerned about the overuse of freshwater resources and asks for your advice on how to conserve water while still being able to enjoy her hobby
Describe two water-conservation practices that your friend can incorporate into her gardening activities.
How may evolution lead to the development of new species (speciation)?
What will be an ideal response?