The basic elements of the classical cell theory state that all living things are composed of cells, cells are the basic unit of structure and function in living things, and cells are produced from other cells.

What Cells Need One similarity between all types of cells is that they have certain requirements they need to keep the organism alive. gs to work properly. In the boxes beside the diagram below (A-D) …

The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

Receives proteins & materials from the ER, packages them, & distributes them Controls what comes into and out of a cell; found in plant and animal cells Produces the energy a cell needs to carry out its …

One of the tiny, threadlike, DNA-containing bodies found in the cell nuclei of all plants and animals, responsible for transmitting hereditary characteristics. Small organelles composed of RNA-rich …

All organisms are composed of cells—the fundamental unit of life. Most organisms are single cells; other organisms, including humans, are multicellular. Cells carry on the many functions needed to sustain …

In this SEM of a squid giant axon, two vesicles can be seen moving along a microtubule. (A separate part of the experiment provided the evidence that they were in fact moving.) What evidence do we …