Which best describes DDT as a pesticide? Select all that apply. a. DDT is able to target destructive insects.
b. DDT decomposes very slowly.
c. DDT can be controlled so it does not spread to other areas.
d. DDT results in antibiotic formation in livestock.
e. DDT is readily absorbed by animal tissue.
f. DDT contaminated ground water and runoff into streams, rivers, and oceans.

This rapid change in species that rarely leaves behind fossil evidence is referred to as

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?

Which of the following is the smallest unit that would contain a complete copy of the entire human genome? a) one human somatic cell b) one human chromosome c) all of the dna of one human d) one human gene