Question 1 of 30 0.0/ 3.33 Points
Which of the following levels of taxonomy is the least inclusive?
A. Genus
B. Class
C. Phylum
D. Order
E. Family
Answer Key: A
Feedback: The levels of taxonomy are, from most to least inclusive: domain, kingdom, phylum, class, order, family, genus, and species.
Question 2 of 30 3.33/ 3.33 Points
Which answer choice lists the steps in the scientific method in their typical order?
A. hypothesis, observation, experiment, conclusion
B. observation, experiment, hypothesis, conclusion
C. observation, hypothesis, experiment, conclusion
D. conclusion, experiment, hypothesis, observation
E. experiment, hypothesis, observation, conclusion
Answer Key: C
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Question 3 of 30 3.33/ 3.33 Points
In the scientific method, the condition which is deliberately changed is referred to as the
A. test
B. hypothesis
C. control group.
D. experimental variable.
E. control variable.
Answer Key: D
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Question 4 of 30 3.33/ 3.33 Points
Which of the following is not considered a basic theory of biology?
A. Ecosystem
B. Gene
C. Homeostasis
D. Atomic
E. Cell
Answer Key: D
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Question 5 of 30 0.0/ 3.33 Points
The unity and diversity of living organisms on our planet can best be explained by which of the following processes?
A. Reproduction
B. Homeostasis
C. Metabolism
D. Evolution
E. Taxonomy
Answer Key: D
Feedback: According to the theory of evolution, organisms have shared characteristics because of their common descent. Over long periods of time (many generations), diverse life-forms have arisen.
Part 2 of 8 - 13.32/ 16.65 Points
Question 6 of 30 3.33/ 3.33 Points
Which structure would be found in large numbers inside cells that are producing lots of proteins?
A. Centrioles
B. Cytoskeletal fibers
C. Lysosomes
D. Ribosomes
E. Mitochondria
Answer Key: D
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Question 7 of 30 0.0/ 3.33 Points
Which cell structure breaks down excess long-chain fatty acids into products that the mitochondria can break down further?
A. Mitochondria
B. Rough endoplasmic reticulum
C. Smooth endoplasmic reticulum
D. Peroxisomes
E. Lysosomes
Answer Key: D
Feedback: Peroxisomes bear the burden of breaking down excess quantities of long-chain fatty acids to products that can be metabolized by mitochondria for the production of ATP.
Question 8 of 30 3.33/ 3.33 Points
Where are lysosomes produced?
A. Mitochondria
B. Golgi apparatus
C. Smooth endoplasmic reticulum
D. Nucleus
E. Rough endoplasmic reticulum
Answer Key: B
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Question 9 of 30 3.33/ 3.33 Points
Which structure can occupy up to 90% of the volume in a plant cell?
A. chloroplasts
B. endoplasmic reticulum
C. nucleus
D. central vacuole
E. cytoplasm
Answer Key: D
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Question 10 of 30 3.33/ 3.33 Points
Which organelle acts as the powerhouse of the cell?
A. chloroplast
B. rough endoplasmic reticulum
C. lysosome
D. mitochondria
E. nucleus
Answer Key: D
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Part 3 of 8 - 16.65/ 16.65 Points
Question 11 of 30 3.33/ 3.33 Points
A type of nonrandom mating that occurs when individuals tend to mate with those having the same phenotype with respect to certain characteristics is referred to as
A. disruptive mating.
B. assortative mating.
C. directional mating.
D. homologous mating.
E. artificial mating.
Answer Key: B
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Question 12 of 30 3.33/ 3.33 Points
This individual's essay on population stated that populations tend to increase faster than the supply of food:
A. Lyell
B. Lamarck
C. Wallace
D. Cuvier
E. Malthus
Answer Key: E
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Question 13 of 30 3.33/ 3.33 Points
If there is a change in allele frequency of a gene pool due to chance, it is referred to as
A. genetic drift.
B. natural selection.
C. nonrandom mating.
D. gene flow.
E. mutation.
Answer Key: A
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Question 14 of 30 3.33/ 3.33 Points
This figure shows the three different types of natural selection. What does "A" represent?
A. Directional selection
B. Genetic drift selection
C. Adaptive selection
D. Stabilizing selection
E. Disruptive selection
Answer Key: D
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Question 15 of 30 3.33/ 3.33 Points
The equation p2 + 2pq + q2 = 1 describe
A. the phenotypic frequency of a population.
B. the size of a population.
C. the genotype and allele frequency of a population.
D. the process of evolution.
E. the rate of speciation of species p and q.
Answer Key: C
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Part 4 of 8 - 9.99/ 16.65 Points
Question 16 of 30 3.33/ 3.33 Points
When two different but related species of plants hybridize, the result can produce a condition referred to as
A. symploidy.
B. autoploidy.
C. gametoploidy.
D. zygoploidy.
E. alloploidy.
Answer Key: E
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Question 17 of 30 3.33/ 3.33 Points
A condition where the number of chromosomes is beyond diploid is referred to as
A. zygoploidy.
B. symploidy.
C. gametoploidy.
D. haploploidy.
E. polyploidy.
Answer Key: E
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Question 18 of 30 0.0/ 3.33 Points
The model of speciation that requires some time with geographic barriers between two populations allowing evolution of reproductive isolation is
A. allopatric speciation.
B. sympatric speciation.
C. habitat speciation.
D. behavioral speciation.
E. temporal speciation.
Answer Key: A
Feedback: Alopatric speciation requires that the populations be separated by a geographic barrier.
Question 19 of 30 3.33/ 3.33 Points
When two closely related but separate species are crossed, their offspring are usually
A. haploid.
B. sterile.
C. more fit than the two parent species.
D. postzygotic.
E. prezygotic.
Answer Key: B
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Question 20 of 30 0.0/ 3.33 Points
Which of the following statements is false about modern corn?
A. It is America's number one field crop.
B. Its artificial selection began between 4,000 and 3,000 B.C.
C. It is very similar to its ancient ancestor.
D. It is an allotetraploid.
E. It comes from a wild grass called teosinte.
Answer Key: C
Feedback: Modern corn bears little resemblance to its ancient ancestor, an inconspicuous wild grass called teosinte from southern Mexico.
Part 5 of 8 - 6.66/ 6.66 Points
Question 21 of 30 3.33/ 3.33 Points
The balance used to record the weight of the kernels of corn measured to a:
A. Hundredth of a gram
B. Tenth of a gram
C. Whole number of grams
D. A kilogram
Answer Key: B
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Question 22 of 30 3.33/ 3.33 Points
In all, how many types of corn were tested for the independent variable?
A. Four
B. One
C. Three
D. Two
Answer Key: A
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Part 6 of 8 - 3.33/ 9.99 Points
Question 23 of 30 3.33/ 3.33 Points
What does it mean when a plant is a BT-plant?
A. The Bacillus thirngiensis gene for Cry protein has been inserted into the plant’s genome.
B. The plant must have Bacillus thuringiensis present to grow.
C. Bacillus thuringiensis is growing with the plant.
D. The plant produces Bacillus thuringiensis.
Answer Key: A
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Question 24 of 30 0.0/ 3.33 Points
BT-corn is a transgenic organism by definition because of which of the following reasons:
A. The ECB acquires the gene for Cry protein from the Bt-corn.
B. DNA from Bacillus thuringiensis is inserted into the corn’s genome.
C. The ECB gene is in the corn.
D. The BT-corn gave the ECB the gene for Cry protein.
Answer Key: B
Feedback: Refer to the "Greenhouse Handbook" for details.
Question 25 of 30 0.0/ 3.33 Points
What happens if an ECB larva eats some BT-corn?
A. The Cry protein from the corn causes the larva to pupate and emerge as adults too early.
B. The Cry protein in the corn enters the stomach of the larva and acts as a poison.
C. The larva immediately pupates where it dies over winter.
D. The ECB larva lays eggs instead of the adult moths.
Answer Key: B
Feedback: Refer to the "Greenhouse Handbook" for details.
Part 7 of 8 - 6.66/ 9.99 Points
Question 26 of 30 0.0/ 3.33 Points
Above is a graph of the average yield for “none”,” low” and “high” infestations for the four corn types.
If there was no ECB infestations predicted for the upcoming growing season and the cost of transgenic corn seed is 10 times that of non-transgenic corn, which type of corn should a farmer select to grow?
A. Golden Crop non-BT
B. Super Harvest non-BT
C. BT 123
D. BT 456
Answer Key: A
Feedback: Since there is no ECB infestation predicted and since the non BT corn types are less expensive the Golden or Superharvest crop should be planted. Since Golden yields more than Superharvest under no infestation it would be the crop of choice.
Question 27 of 30 3.33/ 3.33 Points
Based on your lab calculations of percent reduction in yield at high infestations for the four corn types, what corn type exhibited the highest percent reduction in yield?
A. Golden Crop non-BT
B. Super Harvest non-BT
C. BT 456
D. BT 123
Answer Key: A
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Question 28 of 30 3.33/ 3.33 Points
Which corn type demonstrated the most resistance to the ECB at high infestation?
A. BT 123
B. Super Harvest non-BT
C. Golden Crop non-BT
D. BT 456
Answer Key: A
Feedback: Good job!
Part 8 of 8 - 6.08/ 6.66 Points
Question 29 of 30 2.75/ 3.33 Points
The reading listed several negatives of using Bt corn. Explain two of those below.
long term effects on humans and enviroment
Model Short Answer: 1. Negative impact on non-target insect species like butterflies
2. Can cause human allergic reactions if consumed
3. Target insects species can develop resistances.
Question 30 of 30 3.33/ 3.33 Points
Why do scientists want to create Bt corn?
A Bt corn plant produced Bt Cry protein insecticide, which then protects the plan from infection by insects.
Model Short Answer: A Bt corn plant produced Bt Cry protein insecticide, which then protects the plan from infection by insects.
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