The biological species
What will be an ideal response?
concept defines species based on their potential to interbreed and produce fertile offspring.
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Over the past 50 years, the atmospheric level of carbon dioxide has
a. decreased. b. increased slightly. c. more than doubled. d. stayed the same
Which of the following is a true statement about cycads?
a. Cycads can be pollinated by beetles. b. Cycads are the most common gymnosperm. c. Cycad leaves are a source of ephedrine. d. Cycads have only one surviving species.
In general, communities in early succession will be dominated by fast-growing species with r-selected life histories.
Answer the following statement true (T) or false (F)
Nutrient deficient ecosystems are called ________.
Fill in the blank(s) with the appropriate word(s).