physical activity by Elena
The correct answer is that a butterfly and an octopus do not have Carnegie stages of development, while elephants and turtles do. This is because Carnegie stages of development are stages found only in the development of the vertebrate embryo. Carnegie stages can be defined as a system in embryology, which include 23 stages of the embryonic development, each characterized with the different age, size and morphologic characteristics of an organism.
Answer:
Uracil
Explanation:
In DNA, guanine pairs with cytosine and adenine pairs with thymine. In RNA, thymine changes into uracil.
The answer is B Microscope :)