CHAPTER 1
the scientific study of life
all organisms contain this molecule, which stores genetic information.
DNA.
This term describes anything that has mass and takes up space.
Matter.
this is the smallest unit of matter that still retains the properties of an element.
Atom.
the biological process by which a plant converts light energy into chemical energy.
Photosynthesis.
The smallest unit of life
Cells.
Structure and function.
This subatomic particle carries a positive charge.
A substance made of two or more elements combined in a fixed ratio.
Compound.
This type of cell division produces gametes and halves the chromosome number.
Meiosis.
This biological theme describes how organisms maintain stable internal conditions.
Homeostasis.
This process explains how species change over time and accounts for both unity and diversity of life.
Evolution.
Atoms of the same element that differ in the number of neutrons are called:
Isotopes.
This type of bond forms when atoms share pairs of valence electrons.
Covalent.
Unlike prokaryotic cells, eukaryotic cells contain a structure that houses DNA. This structure is called a:
Nucleus.
Genes carry instructions that are ultimately used to build these functional molecules.
Proteins.
Unlike Eukaryotic cells, prokaryotic cells lack membrane-enclosed structures. What's the name of these structures.
Organelles. And nucleus.
2 covalent bonds to readh 8 valence electrons in the outer shell.
This type of bond results from attraction between oppositely charged ions after an electron transfer.
Ionic bond.
This cellular organelle is responsible for ATP production through cellular respiration.
Mitochondrion
A claim based mainly on personal stories rather than controlled experiments would be classified as....
Pseudoscience.
What is the name of the biological organization that includes all ecosystems on Earth.
Biosphere.
These weak chemical bonds help stabilize the shapes of large biological molecules like proteins and DNA.
Hydrogen bonds.
In a chemical reaction, the starting substances are called_______, and the ending substances are called______.
Reactants and Products.
This term describes interactions among organisms and between organisms and their physical environment
Ecology.