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Flashcards in Unit 1 Deck (24):
1

Homeostasis

Maintenance of stable internal physiological environment in an organism

2

Atom

Smallest unit of an element that retains of the characteristics of that element

3

Organelle

Specialized part of a cell; literally a small cytoplasmic organ

4

Molecule

A group of atoms held together by chemical bonds in a stable association

5

Tissue

Group of cells organized into a structural and functional unit

6

Organ

Body structure composed of several different tissues grouped in a structural and functional unit

7

Organ system

Group of organs with related functions

8

Population

Any group of individuals, usually of a different species, occupying a gi in area at the same time

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Species

A kind of organism

10

Biological community

All the populations of different species living together in one place

11

Ecosystem

Any major interacting system that includes organisms and their non living environment

12

Emergent properties

Novel properties arising from the way in which components interact

13

Deductive reasoning

Logical application of general principles to predict a specific result. Used to test the validity of general ideas

14

Inductive reasoning

Logical application of specific observations to make a generalization. Used to formulate testable hypothesis

15

Experiment

A test of one or more hypothesis

16

Variable

A factor that influences a process, outcome, or observation

17

Reduction

The gain of an electron by an atom, often with an associated proton

18

Evolution

Genetic change in a population of organisms; in general, evolution leads to progressive change from simple to complex

19

Artificial selection

Change in the genetic structure of populations due to selective breeding by humans

20

Homologous

A condition in which the similarity between two structures or functions is indicative of a common evolutionary origin

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Analogous

Structures that are similar in function but different in evolutionary origin

22

Phylogenetic tree

A pattern of descent generated by analysis of similarities and differences among organisms

23

Cell theory

The principle stating that all organisms consist of one or more cells, which are the smallest living things, and that all cells come from preexisting cells

24

DNA

The genetic material of all organisms; composed of two complementary chains of nucleotides wound in a double helix