Experiment: To test maternal antibody transfer, newborn mice from vaccinated mothers were exposed to the pathogen.Observation: Most offspring survived despite not being vaccinated themselves.Question: What is the likely explanation?
Correct answer: D. Antibodies were transferred from mother to offspring.
- A. Offspring developed their own immunity in utero.
- B. Pathogen was inactive.
- C. Maternal vaccination has no protective role.
- D. Antibodies were transferred from mother to offspring.
Explanation
The correct answer is that antibodies were transferred from the mother to the offspring. This explains why most offspring survived despite not being vaccinated themselves. Maternal antibody transfer is a natural process where antibodies from the mother are passed on to the offspring, providing temporary immunity. The incorrect options fail to consider this crucial aspect of maternal immunity transfer, leading to their inaccuracy.
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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.
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