Astudent wonders if adding fertilizer to the soil will make tulips grow faster. the student's hypothesis states if fertilizer is added to the soil, then the tulips will grow faster because fertilizer adds nutrients to the soil. which of the following variables is the independent variable? the type of soil the tulips receive--with or without soil. the time it takes the tulips to grow

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.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

What is the role of the phospholipid belayer in cellular transport in living cells