Insect-eating warblers reduce interspecific competition by which of the following?
a. They migrate into the forests at different times of the year, so that they are not present at the same time.
b. They build their nests in different portions of the same trees.
c. They do not utilize the same tree type or habitat type.
d. They spend a significant portion of their time foraging for insects in different parts of the same trees.
e. They hybridize and produce broods of mixed genetic ancestry.
D
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Which of the following features was not an important process contributing to the formation of Cape Cod into its present-day shape?
A) North to south longshore current
B) Glacial deposition
C) Sea level increases
D) All of these are important processes for Cape Cod's formation.
Small changes in Earth?Sun orbital geometry that resulted in Quaternary glacial and interglacial cycles are called
A) Milankovitch cycles. B) carbon cycles. C) Keeling curves. D) sunspot cycles.
Earth's inner core is a 2,450-km diameter ________ mass with temperatures up to 4,300°C (7,770°F).
A. solid B. gaseous C. liquid D. plasma-like
Which of the following are some of the basic assumptions scientists must make when using the scientific method
A. the fundaemntal rules of nature apply regardless of where and when they occur B. when two different events occur at the same time, they always have the same cause c. specific causes exists for events observed in the natural world d. there are certain causes for events that we can never understand e. the causes of observed events can be identified f. events that occur repeatedly probably have the same cause g. general rules can be used to describe what happend in nature