Assuming a base temperature of 18°C, how many heating degree-days are there for a day with a maximum temperature of -1°C and a minimum temperature of -7°C?
A. 26
B. 24
C. 22
D. 20
Answer: C
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Researchers were studying a population of birds on Daphne Major, one of the Galápagos Islands. A drought caused many plants on the island to die. There were few seeds left for the birds to eat. Small seeds, which were easy to eat, disappeared quickly. Larger seeds remained available. Birds with thicker beaks were better able to crack and eat these larger seeds. Which of the following statements about the population on Daphne Major is TRUE?
A. Birds with thick beaks are more likely to survive during the drought. B. Birds with thin beaks are more likely to survive during the drought. C. Birds with thin beaks and birds with thick beaks are equally likely to survive during the drought. D. It is impossible to tell from the information provided.
How have coastal river deltas, mangrove forests, and coastal wetlands been affected by human activity?
What will be an ideal response?
Glossopteris, a fossil found in Africa, Australia, India, South America, and Antarctica, is significant because ________
A) it demonstrated that all of the continents where the fossil is found must have been tropical when the organism was alive B) it demonstrated that all of the continents where the fossil is found must have been cold when the organism was alive. C) it demonstrated that wind could not have dispersed the organism over such a large area D) it demonstrated that water could not have dispersed the organism over such a large area
Which of the following refers to the investigative process by which geologists identify and match sedimentary strata and other rocks of the same ages in different areas?
a. strata indexing b. super matching c. cross-access dating d. correlation