What will happen if the population of snails decreases?
A - Edexcel - GCSE Biology Combined Science - Question 4 - 2018 - Paper 1
Question 4
What will happen if the population of snails decreases?
A. the population of glow-worms will increase
B. adult glow-worms will eat more snails
C. glow-worm larvae w... show full transcript
Worked Solution & Example Answer:What will happen if the population of snails decreases?
A - Edexcel - GCSE Biology Combined Science - Question 4 - 2018 - Paper 1
Step 1
A. the population of glow-worms will increase
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Answer
If the population of snails decreases, this could lead to an increase in the population of glow-worms. With fewer snails available, glow-worm larvae may predominate in consuming slugs, which are their main prey.
Step 2
B. adult glow-worms will eat more snails
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Answer
This statement may not be entirely accurate, as adult glow-worms primarily feed on light rather than snails. Thus, a decrease in snail numbers does not necessarily translate to increased consumption by adult glow-worms.
Step 3
C. glow-worm larvae will eat more slugs
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As the population of snails decreases, glow-worm larvae may have an opportunity to eat more slugs since snails and slugs share similar habitats and the larvae are known predators of both.
Step 4
D. adult female glow-worms will glow more brightly
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The brightness of adult female glow-worms may not directly correlate with snail population levels. Their glowing is primarily a mating signal and doesn’t change based on food availability.
