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34 Cards in this Set

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atom
The smallest unit of an element that retains an element's properties.
biosphere
All regions of the Earth's waters, crust, and atmosphere in which organisms live.
cell
Smallest living unit, it can survive and reproduce on its own, given its DNA, raw materials, and an energy source.
control group
Group used as a standard for compartison with an experimental group and, ideally, identical with it in all respents except for the one variable being studied.
development
The series of genetically guided embryonic and post-embryonic stages ny which morphologically dsitinct, speicalized body parts emerge in a new multicelled individual.
dicot
Dicotyledon. Flowering plant generally characterized by embryos with two cotyledons; net-veined leaves; and floral parts arranged in fours, fives, or multiples of these.
domain
Part or all of a polypeptide chain that forms a structurally stable, functional unit.
eukaryote
(eukaryotic cell) Cell having a nucleus and other membrane-bound organisms.
evolution
(biological) genetic change in a line of descent. Outcome of microevolutionary events: gene mutation, natural selection, genetic drift, and gene flow.
expermental group
In an experiment to prove a hypothesis, the group where the independent variable is changed
extinction
Irrevocable loss of a species
homeostasis
State in which physical and clemical aspects of internal environment (blood, interstitial fluid) are being maintaines within ranges suitable for cell activities.
hypothesis
In science, a possible explanation of a phenomenon, one that has the potential to be proved false by experimental tests.
metabolism
All the controlled, enzyme-mediated chemical reactions by which cells acquire and use energy to synthesize, store, degrade, and eliminate substances in ways that contribute to growth, survival, and reproduction.
molecule
Two or more atoms of the same or different elements joined by chemical bonds.
monocot
(monocotyledon)A flwoering plant with one cotyledon in seeds, floral parts usually in threes (or multiples of thess), and often parallel-veined leaves.
organ
Body structure with definite form and function that consists of more than one tissue.
organ system
Organs interacting chemically, physically, or both in a common task.
organelle
Membrane-bound sac or compartment in the cytoplasm having one or more speicalized metabolic functions. Most eukaryotic sells have a profucion of them.
procedure
The directions for carrying out an experiment designed to test a hypothesis.
prokaryote
A cell or organism lacking a membrane-bound, structurally discrete nucleus and other subcellular components.
reproduction
The ability to create organisms similar to, but not exactly like oneself.
scientific method
The well-known, organized way to approach science, using the steps: 1. Observation-collecting data 2. Hypothesis-forming a preliminary explanation of the data 3. Testing-testing the hypothesis by collecting data
4. Results-intepreting results and deciding if hypothesis is valid
5. Conclusion-stating a conclusion that can be viewed individually by others.
theory
An explanation for a phenomenon based on observation, experimentation, and reasoning.
taxonomy
The system used to classify organisms.
tissue
A group of cells similar to each other (including common materials) which perform the same function inside a multicelled org.
variable
Conditions within an experiment. You change the independent variable, and you leave all of the constant variable the same.
data
Results that result forma measurement. (Plural - my data show...)
datum
A result that results from a measurement. (Singular - my datum shows...)
phenomenon
An event that occurs in nature and is interesting enough to be worth studying.
protocol
set of instructions for carrying out a procedure.
vascular plants
Plants that have internal tissue systems that conduct water and solutes through roots, stems, and leaves. It is the most diverse of plant types.
matter
Anything that has mass (resistance to having its motion changed) and volume (takes up space).
energy
Types: sound, magnetic/electronic, light, heat, chemical, potential/kinetic/nechanic. Def. ability to change something.