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Listening Quiz: Thách Thức Trong Các Phương Pháp Phân Định Loài – Advanced Level
Th9 3, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Nhà sinh học (English for Biologist)
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1.
What is the conversation mainly about?
Why environmental factors always make molecular methods unreliable
How scientists use both morphology and DNA to identify species, and why each method has limits
How Sarah decided to focus only on physical traits when studying species
How Robert learned to collect DNA samples from different animals
Explanation:
The conversation focuses on species delimitation methods, especially morphological and molecular approaches, and explains that both have advantages and limitations.
2.
According to Robert, what do morphological methods look at?
DNA sequences
Environmental changes in habitats
The number of species in a region
Physical traits of species
Explanation:
Robert says that morphological methods look at physical traits of species.
3.
Why can morphology be misleading, according to Robert?
Because physical traits can vary
Because DNA is always more accurate
Because scientists do not have enough species to compare
Because morphology only works in laboratories
Explanation:
Robert explains that morphology can be misleading due to variation.
4.
What can be inferred from the conversation about scientists’ choice of method?
They avoid morphological methods when environment affects traits
They use only one method because combining methods is confusing
They choose a method based on the species and the data they have
They always prefer molecular methods over morphological methods
Explanation:
Robert says scientists consider the species and available data when deciding which method to use, so the choice depends on those factors.
5.
What did Robert say about combining methods?
It is usually unnecessary because morphology is enough
It solves all DNA-related problems
It is only useful when environmental factors are absent
It often works best
Explanation:
Robert states that combining both methods often works best.
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