Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account



nonliving, referring to the physical and chemical properties of an environment

Active Transport

movement of a substance across a cell membrane against its concentration or electrochemical gradient mediated by specific transport proteins and requiring an expenditure of energy

Adaptive radiation

Period of evolutionary change in which groups of organisms form many new species whose adaptations allow them to fill new or vacant ecological roles in their communities.

Anabolic reactions

REQUIRES ENERGY. chemical reactions in which simpler substances are combined to build more complex molecules.


Seeds can form without fertilization; seeds genetically identical to parent- from the male gamete

Asexual reproduction

Generation of offspring from 1 parent occurring w/out gametes fusion, by budding, division of single cell, or of entire organism into 2 or more parts. In most cases, offspring are genetically identical to parent.


(adenine triphosphate) an adenine containing nucleotide triphosphate that releases free energy when its phosphate bonds are hydrolyzed. Energy drives endergonic reactions in cells.

ATP Synthase

A complex of several membrane proteins that provide a port through which protons diffuse. This complex functions in chemiosmosis with adjacent electron transport chains, using the energy of a hydrogen ion (proton) concentration gradient to make ATP. ATP synthases are found in the inner mitochondrial membrane of eukaryotic cells and in the plasma membrane of prokaryotes.

Binary Fission

A method of asexual reproduction by "division in half." In prokaryotes, binary fission does not involve mitosis, but in single-celled eukaryotes that undergo binary fission, mitosis is part of the process.


Pertaining to the living factors- the organisms- in an envrionment


A type of asexual reproduction in which a new individual develops from outgrowth on the parent.

Calvin Cycle

Second of two major stages in photosynthesis, involving fixation of atmospheric CO2 and reduction of the fixed carbon into carbohydrate

Catabolic reactions(pathway )

metabolic pathway that releases energy by breaking down complex molecules to simpler molecules


An energy-coupling mechanism that uses energy stored in the form of a hydrogen ion gradient across a membrane to drive cellular work, such as the synthesis of ATP. Most ATP synthesis in cells occurs by chemiosmosis.


An organelle found in plant and algae cells where photosynthesis occurs


All the organisms that inhabit a particular area: an assemblage of populations of different species living close enough together for potential interaction

Competitive inhibitor

A substance that reduces the activity of an enzyme by entering the active site in place of the substrate whose structure it mimics.

Concentration gradient

a region along which the density of a chemical substance increases or decreases


An organism that obtains energy and nutrients by feeding on other organisms or their remains.


a kind of allosteric regulation whereby shape change in one subunit of a protein caused by substrate binding is transmitted to all the other subunits, facilitating binding of additional substrate molecules to those subunits

Courtship behavior

behavior that allows males and females of the same species to recognize each other and prepare to mate

Cryptic coloration

camouflage that makes a potential prey difficult to spot against its background


(1) waxy covering that is on the surface of stems and leaves and prevents desiccation of terrestrial plants (2) the exoskeleton of an arthropod made of chitin and protein (3) nematode coat

Cyclic photo-phosphorylation

The synthesis of ATP during photosynthesis, coupled to the cyclic passage of electrons to and from P700, the specialized form of chlorophyll a which is involved in photosystem I, using a series of carrier molecules.


A Network of Microtubules and Interconnected Filaments that extends throughout the cytoplasm and serves a variety of functions : PROVIDE For the SHAPE OF CELLS & ALLOW THE CELL TO BE MOBILE


1. The random movement of molecules or ions or small particles in solution or suspension under the influence of brownian (thermal) motion toward a uniform distribution throughout the available volume; the rate is relatively rapid among liquids and gases, but takes place very slowly among solids.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording