How do producers differ from all other organisms in an ecosystem? a. all other organisms rely directly on the sun for energy. b. producers are the only group capable of making their own food. c. producers regulate the amount of sunlight an ecosystem receives.

2. if scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to? a. roundworms b. annelids c. mollusks d. flatworms

Which of the following is not a defining characteristic of plants?

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back