Bromothymol blue (BTB) is a pH indicator that is also used to detect carbon dioxide (CO2). BTB is blue when pH is basic and CO2 is low. BTB is yellow when pH is acidic and CO2 is high. BTB is green when pH is neutral. A group of students are planning to perform an investigation in which they will place either a stalk of the aquatic plant elodea or a snail in a test tube that contains water with a neutral pH of 7 and BTB. The students will also include a test tube that contains elodea and a snail. Observing color change once the tubes have been placed under a growth light for several hours will allow the students to answer which TWO of the following questions?
Biology EOC Short Practice Test

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others
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10th Grade
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Hard
Madeline Lynch
Used 143+ times
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21 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Does cellular respiration occur at a higher rate than photosynthesis in the tube with only elodea?
Does elodea produce oxygen during photosynthesis?
Do snails respire faster when placed in a tube with elodea?
Do snails use the CO2 produced by elodea to produce oxygen?
Does photosynthesis performed by elodea remove CO2 from the water?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which row in the chart represents the most likely changes in the atmosphere due to widespread deforestation (removal of trees)?
Row 1
Row 2
Row 3
Row 4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement best explains the events represented in this diagram?
A gene mutation caused the cells to become muscle cells.
The growth resulted from the introduction of a vaccine.
A gene mutation caused abnormal mitotic division.
The growth resulted from uncontrolled meiotic division.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which description explains the role of the tRNA in the process shown in this model?
The tRNA delivers amino acids to the ribosome so that they can be added to the developing peptide.
The tRNA recognizes the stop codon of a developing peptide so that no new amino acids are added.
The tRNA signals the release of the peptide from the ribosome once all of the amino acids have been added.
The tRNA scans the developing peptide to make sure that the sequence of the amino acids matches the mRNA.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hemoglobin is a protein found in red blood cells of vertebrates and in the plasma of many invertebrates. The function of this protein is to transport oxygen throughout the body and to bring carbon dioxide back to be expelled from the organism. If the amino acid sequence of the protein is altered, the mutated protein is not as efficient at carrying oxygen as is the normal hemoglobin. Which argument is supported by this information?
The mutated hemoglobin protein can still carry carbon dioxide to be expelled from the organism.
Hemoglobin must be a simple molecule because it is found in both vertebrates and invertebrates.
Structural changes of hemoglobin affect its ability to carry oxygen indicating that the shape of a protein is important to its function.
Normal hemoglobin must be a larger molecule than the mutated hemoglobin since it has sufficient space to attach to and carry both oxygen molecules and carbon dioxide molecules.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Students created the following model using paper plates, flat wooden sticks, cotton swabs, and construction paper. Which statement correctly uses the model to explain how mitosis maintains genetic continuity?
The chromosomes in cell 1 are the same as in cells 6 and 7.
Crossing-over occurs in cell 4, which increases the genetic diversity in cells 6 and 7.
When the nuclear membrane reforms in cell 5, each nucleus becomes diploid in number.
The independent assortment that is represented in cell 2 ensures that cell 3 has the correct number of chromosomes.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A male and female have a child that has three copies of chromosome 18. Although both parents are unaffected, their doctor claims that the disorder associated with having an extra chromosome 18 is the result of a chromosomal mutation in cells that carry inherited material. Which argument supports this claim?
A mutation occurred when crossing over caused chromosome 18 to be replicated twice during meiosis, allowing one parent to donate two copies of chromosome 18 to the child.
A nondisjunction mutation was caused by the improper separation of the genetic material during meiosis, allowing the gamete of one parent to donate two copies of chromosome 18 to the child.
A substitution mutation during replication allowed the genetic material of chromosome 18 to replace the genetic material of a nearby chromosome, causing the child to have three copies of chromosome 18.
An insertion mutation during replication allowed the genetic material of chromosome 18 to be inserted into the genetic material of another chromosome, causing three copies of chromosome 18 to be made.
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