Which of the following provides evidence that all living things share common ancestors? 1.Fossil record
2.Analogous Structures
3.Homologous Structures
4.Similarities in DNA sequences

a. All of these

b. 1, 3 and 4

C.4 only

d. 2 and 3 only

Match the examples to the correct level of organization. 1. system level roses, snakes, puppies 2. organism level roots, stamens, leaves 3. tissue level bone, cartilage, blood 4. organ level heart, veins, arteries

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.

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?