discussed the theory put forth by the Alvarez family about why the dinosaurs became extinct. Pretend that someone has asked you why the dinosaurs became extinct. Give a good, full explanation using ideas from the video.

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

Examine the air pressure map. which type of line is shown on the map?

Asegment id dna that is artificially created from two or more organism through use of dna enzymes in a laboratory is called a segment of dna that is artificially created from two or more organisms through use of dna enzymes in a laboratory is called