What evidence would support maria's claim that the fossilized remains are that of a bird, class aves, instead of a turtle, class reptilia? a) the eggs b) a backbone c) a keeled sternum d) warm-bloodedness

The correct answer is - C)  a keeled sternum.

The birds and the turtles have multiple differences in their anatomy, and of the biggest is that the birds have wings, while the turtles don't. Because of the development of the wings, the birds have keeled sternum. The keeled sternum in the birds is an adaptation that supports the ability for flying. The kelp in the birds runs axially along the midline of the sternum, extending outwards, in a perpendicular manner to the plane of the ribs. The turtles lack this kind of anatomy, so it is a safe bet to state that the fossil is a bird one if it includes a keeled sternum.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e