Your class is competing with another class to determine who has the best plant color. Your class decides to test a couple of solutions to determine which would be best for overall plant color before competing. Starting with four sets of four plants, the class decides to water each set with a different solution. They water them once a week with 200ml of the following solutions: water, diet soda, 1% bleach solution, and a 1% salt solution. All plants are placed in the window that receives the recommended amount of light. After a month of testing, your class notices that only two plants are alive, but one of those two does not look healthy. Based on these results, which of the following would be a good hypothesis to design the next experiment around?
A. Plants need more than 200 mL of liquid per week.
B. Salt has no impact on plant health.
C. Salt contains useful nutrients for plants.
D. A combination of the solutions tested will produce healthier plants.
Since only 2 out of the initial 16 plants survived the whole month, it would be reasonable to test variables that were shared by all the plants. As such, the amount of liquid the plants need would be a good follow-up experiment. It is not specified as to which plants survived, so there is not enough information to think that testing the impact of salt is warranted. Additionally, since almost all the plants died, it is not reasonable to assume that a combination of the solutions would have an impact.
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Science
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Q #1: What is the name for the physical presentation of an organism's genes?
A. Phenotype
B. Species
C. Phylum
D. Genotype
Answer Explanation
Phenotype is the physical presentation of an organism's genes. In other words, the phenotype is the physical characteristics of the organism. Phenotype is often contrasted with genotype, the genetic makeup of an organism. The genotype of the organism is not visible in its presentation, although some of the characteristics encoded in the genes have to do with physical presentation. A phylum is a group of classes that are closely related. A species is a group of like organisms that are capable of breeding together and producing similar offspring.
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Q #2: Which of the following statements best defines an organelle?
A. Layer of polysaccharides outside the plasma membrane of cells
B. Abnormal Infectious proteins
C. Specialized structures within a cell
D. Collection of tissues used to serve a specific function
Answer Explanation
Organelles are specialized structures within a cell that serve a specific function. For example, mitochondria supply energy to the cell by generating adenosine triphosphate. Ribosomes are the site for protein synthesis. The nucleus is in charge of all of the activities of the cell.
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Q #3: Which of the following conclusions is supported by the data from this survey?
A. Dally screen usage in the United States decreases with age
B. Daily screen usage in the United States, increases with age.
C. In the United States, most people use screens more than 3 but less than13 hours a day
D. In the United States, people over 75 generally don't use screens.
Answer Explanation
The percentage of respondents that indicated average screen usage between 4-12 hours per day is (628 +650+389) ÷ 2, 307 ≈ 0.723 or 72.3% This is indeed a significant majority of the responses and would be a reasonable conclusion. The highest screen usage is in the middle two groups with both the younger and older groups indicating less screen usage, so the daily usage neither increases nor decreases with age. While the oldest group shows the least usage per day, the survey data indicates that some of the Individuals over 75 do indeed use screens.
