A farmer observes that increasingly higher concentrations of a particular pesticide have been required each year over the past ten years to achieve the same level of effectivness on a specific insect pest. Which of the following best helps explain the observation?Some individual insects are more likely than others to survive and reproduce due to their inherited traits. the absorption of a substance by an organism at a rate greater than the rate of eliminationboth

Some individual insects are more likely than others to survive and reproduce due to their inherited traits

Explanation:

Organisms are able to develop resistance to harsh environmental factors due to inherited traits which enable them to survive and become better adapted to their environment.

Some pests must have overtime acquired resistance to the concentration of the pesticide used in each year and passed on these traits to their offspring. This resistance accounts for the need for the use of a higher concentration of pesticide each year to overcome the resistance acquired by some pests.

Some individual insects are more likely than others to survive and reproduce due to their inherited traits

Explanation:

One of the major challenges that farmers face in insect pest control and management of present, is the increase in pesticide resistance that most insect pests have built up over time with the increase in the quantity used.  

Over time some members of a population of insects that possess desirable traits that make them withstand the effects of chemicals and traits that increase their reproduction rate become selected against other members that have traits that make them unfit to survive.  

With time, the individuals with traits that make them fit to survive, produce more offspring with desirable traits than those individuals with traits that make them vulnerable and unfit. Members with inherited traits that increase resistance and survival, become more common in the population of that specific insect.

This explains why higher concentrations of a particular pesticide have been required each ear over the past ten years to effectively eradicate same specific insect pest.

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation