Science Chapter 2 Study Guide

__________ are things that have all the characteristics of life.

A macromolecule that forms when long chains of nucleotides join is a

__________ is the smallest unit of life.

Which instrument helped in the discovery of cells?

Proteins are produced at the __________.

An organelle made of a network of thread-like proteins that are joined to form a framework inside a cell

The investigation and exploration of natural events and of the new information that results from those investigations

A substance that forms by joining many small molecules

Prokaryotic cells have genetic material that

Plants, Animals, Protists, and Fungi are all

Which macromolecule does not dissolve in water?

A membrane-surrounded component of a cell that has specialized functions is an

All living things are made of cells, that the cell is the smallest unit of life, and cells come from preexisting cells

Energy is released during chemical reactions that occur in what organelle?

What organelle in eukaryotic cells directs all the cell's activity?

What organelle stores food, water, and waste material?

What is the common function of glucose from plant cells and ATP?

An explanation based on scientific knowledge resulting from many observations and experiments is a

What two scientists invented the early microscope?

Living things that are made of one cell

Where do cells come from?

Plant cells have a ___________ but animal cells only have a ___________.

For a cell to survive, its surface area must be large compared to its

What basic substances make up a cell?

The factor that is changed by the investigator to observe how it affects a dependent variable

A logical explanation of an observation that is drawn from prior knowledge or experience

Living things that are made of two or more cells

A long chain of amino acid molecules

What are the functions of proteins in a cell?

Osmosis is the diffusion of __________ molecules only through a membrane.