Which type of pesticide is known for accumulating in the tissues of plants and animals?

The type of pesticide known for accumulating in the tissues of plants and animals is accurately referred to as accumulative. Accumulative pesticides can build up in the organisms over time, leading to potentially harmful concentrations. This characteristic is significant because it raises concerns about environmental and health effects, as the cumulative impact can disrupt ecosystems and food chains.

In contrast, systemic pesticides are absorbed by plants and affect the whole plant, but they don’t necessarily accumulate in tissues of animals or plants in the same way. Residual pesticides refer to those that remain in the environment for a long period after application but do not specifically indicate the accumulation in tissues. Inert substances, on the other hand, do not contribute to the pesticide's effectiveness and do not relate to accumulation. Therefore, understanding the nature of accumulative pesticides is crucial for pesticide management and safety.