Ahuman action that might result in a decrease in diversity in an area includes

planting trees
reintroducing a native species
taking down fences and letting species roam larger territories
overfishing and over hunting

question 24(multiple choice worth 1 points)

some plants grow in trees and steal water and nutrients from the tree. this is an example of

parasitism
commensalism
mutation
mutualism

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.