The changes in the average temperature of the Earth's surface is known as
A. climate change.
B. ozone depletion.
C. global warming.
D. greenhouse gases.
Answer: C
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It has been hypothesized that fungi and plants have a mutualistic relationship because plants make sugars available for the fungi's use. What is the best evidence in support of this hypothesis?
A) Fungi survive better when they are associated with plants. B) Radioactively labeled sugars produced by plants eventually show up in the fungi with which they are associated. C) Fungi associated with plants have the ability to undergo photosynthesis and produce their own sugars, while those not associated with plants do not produce their own sugars. D) Radioactive labeling experiments show that plants pass crucial raw materials to the fungus for manufacturing sugars.
He structure labeled __________ in Figure 35-1 is formed in the leaf scars by vascular tissue that extends from the stem out into the leaf
T
a. 5
b. 6
c. 7
d. 8
e. 9
Which of the following is not a typical attribute of an early-successional species?
A) rapid growth B) excellent dispersal ability C) large seed size D) shade-intolerance E) ability to colonize unexploited environments
A particular variant of the lambda bacteriophage has a DNA double-stranded genome of 51,365 base pairs. How long would this DNA be?
What will be an ideal response?