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At what temperature do nuclear reactions begin in the core of a pre-main-sequence star?
Second-Generation Pesticides
Pesticides developed to overcome resistance or environmental concerns associated with first-generation pesticides, often designed to be more targeted or biodegradable.
Spiders
Arachnids characterized by eight legs, typically spinning webs to capture prey, and playing a significant role in controlling insect populations.
Spruce Budworm
A destructive North American caterpillar that infests conifer forests, notably spruce and fir trees, causing significant damage to these ecosystems during outbreak periods.
Pheromones
Substances created and emitted by an animal into its surroundings that influence the behavior or bodily functions of other members of the same species.
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