If 100 bean seeds were planted in an area the size of your textbook and they all started to grow, you would expect
A. the population density to increase.
B. the biomass to decrease.
C. the population density to decrease and the size of the biomass to increase.
D. the population density to increase and the size of the biomass to decrease.
C. the population density to decrease and the size of the biomass to increase.
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Which type of defense mechanism is not classified as the first line of defense?
a. Chemical barriers b. Skin c. Mechanical barriers d. Physical barriers e. Leukocytes
Considering two species of birds, which of the
following is a derived character?
a. four limbs b. a bony skeleton c. egg production d. feathers e. two eyes
In flatworms, the action of ciliated __________ draws interstitial fluid into a system of tubes that delivers it to the
body surface. Fill in the blank(s) with the appropriate word(s).
Ginkgo trees are known to lose their leaves at a certain time each year throughout the United States. Based on this information, Ginkgo trees in China must behave the same way. These statements are an example of:
A. inductive reasoning B. a theory C. an experiment D. deductive reasoning