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why isn’t ddt an ideal pesticide? select all that apply.

it did not work well at wiping out the insect population.
over time insects started to become resistant to ddt.
ddt contaminated ground water and runoff into streams, rivers, and oceans.
ddt decomposes very slowly.
readily absorbed by animal tissue.
causes cancer in humans.

The correct answer will be option- all options except  It did not work well at wiping out the insect population are correct.

Explanation:

DDT or is the first modern synthetic insecticide used by the farmers.

Earlier it proved beneficial to the farmers but later it proved lethal to humans as it caused many hazards to the environment like:

1. caused contamination of groundwater and running water due to leaching or washing from the fields.

2. DDT proved fatal as it is non-degradable and if then slow degradation.

3. stored in animal fat tissue like in Hawks and Eagles.

4. cases of human cancer reported and increased due to the consumption of this DDT.

5. Insects like a house fly evolved resistance to DDT.

Thus, all options except It did not work well at wiping out the insect population are correct.

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.