Barnacles and mussels are filter feeders that attach themselves to rocks in the ocean. they eat by filtering small particles of food from the ocean water as it flows over them. a scientist observed a dense colony of barnacles covering the surface of a rock. the mussels were only able to attach to a few, small crevices on the same rock. evaluate this observation and explain a limiting factor that is affecting the barnacles and mussels on the ocean rock. biology short paragraph to write 50 points me

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.

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

What are the pros and cons of transect sampling?