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.

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?