1. Which of the following statements best describes a prediction?
а
The number of deformed frogs in five
ponds that are polluted with chemical X
is higher than the number of deformed
frogs in five ponds without chemical X.
If the water in a pond has lower levels of
b pesticide then there will be less
deformed frogs.
С
The number of deformed frogs is not
affected by the presence of chemical X in
the pond.

it marks things for degradation via the proteasome. it alters there celluar location.

the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

the answer is b.

hope it