Biology TEKS Correlations
(4) Science concepts. The student knows that cells are the basic structures of all
living things and have specialized parts that perform specific functions, and that
viruses are different from cells and have different properties and functions. The
student is expected to:
(D)identify and describe the role of bacteria in maintaining health such as in digestion and in causing diseases such as in streptococcus infections and diphtheria.
31.
Many bacteria are decomposers. When agricultural chemicals are used excessively on fields, the bacterial
populations can be reduced or eliminated. The effect of this reduction of decomposers in the soil may be to
A.
B.
C.
D.
32.
A group of bacteria called obligate anaerobes can be killed by exposure to oxygen. Where would this type
of bacteria most likely be found?
A.
B.
C.
D.
33.
lower the nutrient content of the soil
elevate carbon dioxide levels in the soil
lower the oxygen content of the soil
elevate the water content of the soil
The digestive tract of a cow
The nodules of plant roots
Streams fed by melting snow
Sediment at the bottom of a pond
Some bacteria can reproduce so rapidly that within 48 hours a single bacterium can produce a population
of offspring equal to the volume of the Earth. What prevents this from happening?
A.
B.
C.
D.
Competition with viruses
Absence of sunlight
Limited nutrient supply
High oxygen levels
Charles A. Dana Center
Science TEKS Toolkit
www.sciencetekstoolkit.org