Amutation changes the dna sequence aagcctggcaat to the new sequence aagcctgcgcaat. what kind of mutation has occurred? a. deletion b. insertion c. duplication d. substitution

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Regarding most of the narrator’s story, which word best describes the tone?

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.