What characteristic do the nucleus, the mitochondria, and the vacuoles of animal cells have in common?
a. they all create energy while doing their tasks.
b. they all contain some of the cell's dna.
c. they are all enclosed by membranes made of phospholipids.
d. they are all involved in producing food for the cell.

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.

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what