EXAM: ECOSYSTEM
October 06, 2022
Essayheroes
5 out of 5 points
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The best way to reclaim an ecosystem that is extensively damaged is to ____. |
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| Selected Answer: |
e.
implement ecological restoration |
| Correct Answer: |
e.
implement ecological restoration |
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0 out of 5 points
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The loss of mayflies from a stream suggests that the quality of water is declining; therefore, mayflies are a(n) ____ species. |
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| Selected Answer: |
d.
endangered |
| Correct Answer: |
e.
indicator |
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5 out of 5 points
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To a person studying utilization of cage space for lions in a zoo, the most useful data would be expressed by the number of ____. |
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| Selected Answer: |
e.
lions per square foot |
| Correct Answer: |
e.
lions per square foot |
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5 out of 5 points
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Which element is a density-dependent factor that controls the size of a population? |
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| Selected Answer: |
a.
resource availability |
| Correct Answer: |
a.
resource availability |
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5 out of 5 points
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Sea lions can live into their thirties and produce no more than one pup per year. A sea lion is a(n) ____ species. |
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| Selected Answer: |
c.
K-selected |
| Correct Answer: |
c.
K-selected |
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5 out of 5 points
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An array of organisms together with their physical environment is referred to as a(n) ____. |
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| Selected Answer: |
b.
ecosystem |
| Correct Answer: |
b.
ecosystem |
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0 out of 5 points
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Which item would be most attractive to a fire ant? |
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| Selected Answer: |
c.
a canvas patio umbrella |
| Correct Answer: |
e.
an electric can opener |
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0 out of 5 points
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Secondary succession can occur ____. |
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| Selected Answer: |
b.
on a glacier |
| Correct Answer: |
e.
after a fire |
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5 out of 5 points
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Variations in the timing of master gene expression during embryonic development in vertebrates is responsible for ____. |
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| Selected Answer: |
d.
differences in adult body form |
| Correct Answer: |
d.
differences in adult body form |
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5 out of 5 points
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All vertebrate embryos have _____ at some point during embryonic development, indicating a common evolutionary ancestor. |
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| Selected Answer: |
b.
four limb buds, a tail, and somites |
| Correct Answer: |
b.
four limb buds, a tail, and somites |
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0 out of 5 points
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Typically, where would the oldest fossils be found? |
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| Selected Answer: |
a.
on the ocean floor |
| Correct Answer: |
b.
deep layer of the Earth |
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5 out of 5 points
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Environmental pressures result in a(n) ____ of adaptive alleles. |
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| Selected Answer: |
d.
increase in the frequency |
| Correct Answer: |
d.
increase in the frequency |
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0 out of 5 points
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In the universal ABO blood grouping system, there are four phenotypes – A, B, AB, and O – which are determined by three different alleles. The presence of three alleles in the ABO blood grouping system is an example of ____. |
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| Selected Answer: |
e.
a dimorphism |
| Correct Answer: |
c.
a polymorphism |
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5 out of 5 points
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In Lake Victoria, hundreds of cichlid fish species arose after the lake last dried up 12,400 years ago. This is an example of ____. |
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| Selected Answer: |
d.
sympatric speciation |
| Correct Answer: |
d.
sympatric speciation |
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5 out of 5 points
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A ____ secretes a chemical message for the purpose of cellular communication. |
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| Selected Answer: |
e.
neuron |
| Correct Answer: |
e.
neuron |
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5 out of 5 points
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Constriction of the pupil of the eye is caused by ____. |
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| Selected Answer: |
a.
smooth muscle |
| Correct Answer: |
a.
smooth muscle |
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5 out of 5 points
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Sensory information is received by the ____. |
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| Selected Answer: |
d.
brain |
| Correct Answer: |
d.
brain |
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5 out of 5 points
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Stomata ____. |
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| Selected Answer: |
d.
allow the movement of gases into and out of plants |
| Correct Answer: |
d.
allow the movement of gases into and out of plants |
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5 out of 5 points
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What simple tissue composed of living cells is responsible for supporting rapidly growing plant parts such as young stems and leaf stalks? |
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| Selected Answer: |
d.
collenchyma tissue |
| Correct Answer: |
d.
collenchyma tissue |
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0 out of 5 points
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The tissue found in the center of a root is ____. |
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| Selected Answer: |
a.
pith |
| Correct Answer: |
b.
xylem |
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