1. an animal that has body parts that extend outward from its center shows (1 point) a) radial symmetry. b) segmentation. c) several planes of symmetry. d) bilateral symmetry. 2. a coelom is a body cavity (1 point) a) completely lined with mesoderm. b) partially lined with mesoderm. c) without mesoderm. d) partially lined with endoderm.

1-a

2-a

3-c

4-b

5-b

Lesson 3: Animal Body Plans: 2

most community's take hundreds of years to become stable

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.