Which mechanism causes the distinct caste system stages in social insect colonies?

💡 Explanation

When pheromones are released by queen insects, they trigger differential gene expression in developing larvae determining caste specialization because these chemicals bind to receptors, initiating specific developmental pathways. Therefore pheromone regulation establishes different castes rather than nutrient limitation, temperature, or microbes which have different control mechanisms.

• Which process dominates when a freshwater fish's gill epithelium experiences increased permeability?
• Which process triggers heat production when bats arouse from torpor?
• Which risk to fish increases as ambient temperature rises while oxygen levels are already low?
• Which outcome results when a small mammal minimizes torpor duration?
• Which factor most decreases the surface area for gas exchange if a fish's secondary lamellae fuse together?
• Which outcome will occur if a migratory Bird loses function within its Hippocampus?