Experiment: During a field study, frogs were exposed to simulated rainfall containing varying pH levels (neutral to acidic). Skin permeability and behavior were monitored.Observation: Frogs in acidic water showed stress behaviors and disrupted ion balance in skin cells.Question: What does the experiment support?
Correct answer: C. Acid rain can disrupt amphibian homeostasis.
- A. Skin in frogs resists any pH change.
- B. Acid rain increases amphibian reproduction.
- C. Acid rain can disrupt amphibian homeostasis.
- D. Acidic water improves survival rates.
Explanation
The correct answer is that acid rain can disrupt amphibian homeostasis. This conclusion is supported by the observed stress behaviors and disrupted ion balance in frogs exposed to acidic water. The other options are incorrect because they do not align with the experiment's results, which demonstrated the negative effects of acidic water on frogs' behavior and skin cells.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
Practise Scientific Reasoning
334 free Scientific Reasoning MCQs from Analytical and Logical Reasoning, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Analytical and Logical Reasoning questions like this
Analytical and Logical Reasoning is on 27 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Scientific Reasoning questions
Experiment: Chick embryos were incubated in sealed containers with varied oxygen levels (5%, 15%, 21%). Their growth was monitored for a week.Observation: Embryos in 21% oxygen developed normally, those in 5% showed poor growth and deformities.Question: What conclusion can be made?
Experiment: Mature red blood cells and white blood cells were placed in a hypotonic solution, and their structural integrity was observed over time.Observation: Red blood cells swelled and burst quickly, while white blood cells remained intact for a longer time.Question: What explains the observed difference?
Experiment: To study reflex action, a subject's knee-jerk response was tested after applying pressure to the thigh nerve.Observation: The reflex was immediate and involuntary.Question: Which conclusion is accurate?
Experiment: To examine nutrient transport, a dye was introduced into the roots of two identical plants. One was placed in cold conditions; the other at room temperature.Observation: Dye reached leaves faster in the room temperature plant.Question: What conclusion is best supported?
Experiment: Two fish species were kept in water with rising CO₂ levels. Their gill movement and blood pH were measured.Observation: Fish A maintained blood pH better and showed slower breathing changes than Fish B.Question: What can be inferred?
Experiment: To test the role of sunlight in vitamin D synthesis, mice were divided into two groups: one exposed to sunlight, the other kept in the dark.Observation: Only the sun-exposed group had detectable vitamin D levels after 10 days.Question: What conclusion is valid?