is an organized way of using evidence to learn about the natural world.
involves using one or more of the senses: hearing, sight, touch, smell, taste.
The information gathered from observations, or evidence.
-is a logical interpretation based on prior knowledge and experience.
is a possible explanation for a set of observations or an answer to a scientific question
is the idea that living matter can arise from nonliving matter.
is an experiment in which only one variable is changed at a time
-is the variable that is deliberately changed.
is the variable that is observed and that changes
is evidence from numerous investigations builds up, a particular hypothesis may become well supported that they are given a specific title.
-is the science that seeks to understand the living world.
is a collection of living matter enclosed by a barrier that separates the cell from its surroundings.
two cells from different parents unite to produce the first of the new organism.
the new organism has a single parent.
is the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes.
is the process by which organisms keep stable internal conditions.
is an attraction between molecules of the same substance.
is an attraction between molecules of different substances.
is the basic unit of all forms of life.
theory that states that all living things are composed of cells, cells are basic unit of structure and function in living things, and new cells are produced from existing cells
is a thin flexible barrier around the cell
strong layer around the cell membrane
is a large structure that contains the cells genetic material and controls the cells activities
the material inside the cell membrane (not including the nucleus)
has cell membranes and cytoplasm but do not contain nuclei
has cell membranes and cytoplasm and nuclei.
are structures that perform important cellular functions.
is the granular material visible within the cell
is a distinct threadlike structures containing genetic information that is passed from one generation to the next.
small dense region in the cell that's function is the assembly of ribosomes
is a double membrane layer that surrounds the nucleus
structure that helps support the cell
are hollow tubes of protein 25 nanometers in diameter.
are long thin fibers that function in the movement and support of the cell.
small particles made of RNA and protein where proteins are assembled.
internal membrane system in eukaryotic cells
stack of membranes that attach lipids and carbohydrates to proteins and send proteins to their final destinations
are small organelles filled with enzymes.
saclike structures that store water, salts, proteins, and carbohydrates
are found in plants and use energy from sunlight to make energy- rich food molecules in the process of photosynthesis.
are organelles that release energy from stored food molecules.
the core of nearly all cell membranes and is a double layered sheet
is the mass solute in a given volume of solution or mass/volume.
causes many substances to move across a cell membrane but doesn't require energy. (Where molecules move from high to low concentration)
this means that some things can pass this membrane while others can not.
is the diffusion of water molecules through a selectively permeable membrane.
is the movement of specific molecules across cell membranes through protein channels.
is an energy requiring process that moves material across a cell membrane against a concentration difference.
is the process by which a cell takes material into the cell by means of infolding of the cell membrane.
is the process in which extensions of cytoplasm surround and engulf large particles and take them into the cell.
is the process by which a cell releases large amounts of materials
separate roles for each type of cell in multi-cellular organisms
group of similar cells that perform a particular function.
a group of tissues that work together to perform a particular function.
a group of organs that work together to form a particular function