Areas that receive heavy rainfall tend to have ____ soils, and arid regions tend to have ____ soils
a. acidic; alkaline
b. pH-neutral; acidic
c. alkaline; acid
d. acidic; pH-neutral
e. pH-neutral; alkaline
ANSWER: a
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About 80% of all living gymnosperm species belong to the phylum ____
a. Anthophyta b. Cycadophyta c. Ginkgophyta d. Gnetophyta e. Coniferophyta
CO2 and H2O will not form glucose on their own because ____
a. CO2 does not contain sufficient energy b. H2O does not contain sufficient energy c. neither CO2 nor H2O contain sufficient energy d. the concentration of CO2 is too low in the atmosphere e. the bonds of CO2 and H2O are too stable to be broken without an input of energy
Which is a likely biotic factor limiting songbird distribution in Hawaii to alpine habitats?
A) temperature B) oxygen content C) moisture D) insects causing fatal diseases in songbirds at lower altitudes
Variation at the molecular level of a gene is called a(n) _________
A. nucleotide B. chromosome C. allele D. trait E. None of the answers are correct