Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat. what happens to the other members of the food chain if the cat is removed? a. the number of plants, snails, and birds increase. b. the number of plants and snails increase and the number of birds decreases c. the number of plants increases and the number of snails and birds decrease. d. the number of plants and birds increase and the number of snails decreases.

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?