7. a student observing birds in a park records
some ways that birds interact with living and
nonliving parts of their environment. all the
following observations are ways that a bird
interacts with nonliving parts of its environment
except -
a. reacting to morning sunlight by singing
b. drinking and taking a bath in a puddle of
water
c. responding to cold temperature by fluffing
its feathers
d. feeding insects to its chicks

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.