What do birds have that distinguishes them from other organisms?
a. four-chambered hearts
c. amniotic eggs
b. wings
d. feathers

Acquired mutations can result from radiation pollution toxins inheritence select all that apply

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt