The most recent North American glaciers reached their maximum thickness and extent between about ____
a. 700 and 600 million years ago
b. 65 and 55 million years ago
c. 2.5 and 2 million years ago
d. 50,000 and 45,000 years ago
e. 26,000 and 20,000 years ago
ANSWER: e
You might also like to view...
Colleges and universities can advocate for sustainability with a focus on local biodiversity by ________
A) using native plants in landscaping B) having procedures and technology to use energy and water efficiently C) ignoring recommendations from an audit of operations D) choosing to build new buildings using "green" materials, designs, and technology E) conducting an audit of operations to determine ecological footprint
What is the difference between a community and an ecosystem?
What will be an ideal response?
Given a non-cyclic alkane, a non-cyclic alkene, and a non-cyclic alkyne, each of which contains six carbon atoms, which compound will contain the fewest hydrogen atoms?
A) the alkane B) the alkene C) the alkyne D) It is not possible to tell, without knowing how many double and/or triple bonds are present in the unsaturated compounds.
Compared to inorganic fertilizers, organic fertilizers, such as
A) cow manure applied to a field, increase the chances of nutrient leaching. B) cow manure applied to a field, reduce the chances of nutrient leaching. C) liquid ammonia sprayed on a field, decrease the chances of nutrient leaching. D) liquid ammonia sprayed on a field, increase the formation of humus.