What are the consequences of increasing crop yields to feed a growing human population?
A. All of the answer options are correct.
B. loss of biodiversity through conversion of
forests and grasslands to agricultural fields
C. eutrophication and dead zones resulting
from increased use of fertilizer
D. greater input of carbon dioxide into the
atmosphere through the burning of fossil fuels
E. decreased biological storage of carbon
through deforestation
A
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Apical dominance is maintained by ____
a. hormones released by the terminal bud b. sugars produced in the leaves c. water transported from the roots d. hormones released by the lateral buds e. sugars produced in the lateral buds
In human lungs, gas exchange occurs at the _____
a. two bronchi c. alveolar sacs b. pleural sacs d. both pleural sacs and alveolar sacs
In DNA replication, what type of molecule is a
primer?
a. nucleic acid b. lipid c. protein d. carbohydrate e. inorganic
The lakes of northern Minnesota are home to many similar species of damselflies of the genus Enallagma. These species have apparently undergone speciation from ancestral stock since the last glacial retreat about ten thousand years ago
Sequencing which of the following would probably be most useful in sorting out evolutionary relationships among these closely related species? A) conserved regions of nuclear DNA B) mitochondrial DNA C) amino acids in proteins D) ribosomal RNA