Biology Chapter 1

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Mr.Brannan's Biology 1 Honors Chapter 1 Vocab

asexual reproduction

production of offspring that doesn't involve union of gametes

autotroph

organism that uses energy to synthesize organic molecules from inorganic substances

biology

the science that studies living organisms

differentiation

process which cells of multicellular individuals become specialized during development

DNA

hereditary info in form of large molecule, deoxyribonucleic acid

evolution

all changes that have formed life on Earth from earliest beginning to diversity that characterizes it today

gene

segment of DNA, contains coding for polypeptide or protein; unit of hereditary info

heterotroph

organism that obtains organic food molecules by eating organisms or their by-products

homeostasis

stable internal conditions of a living thing

multicellular organism

living thing, consists of more than one cell

natural selection

process which organisms w/ favorable variations reproduce at higher rates than those w/o such variations

organism

an individual animal, plant, or single-celled life form.

photosynthesis

conversion of light energy into chemical energy stored in organic compounds

sexual reproduction

production of offspring from combination of genetic material from two parent organisms

unicellular organism

living thing composed of one cell

development

process which an organism grows

metabolism

sum of all chemical processes in living things

control group

in experiment a group or individual that serves as a standard of comparison w/ another group or individual to which it is identical except for one factor

controlled experiment

test of variables using a comparison of a control group w/ an experimental group

dependent variable

responding variable in an experiment

experiment

a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact

experimental group

subject that receives the independent variable

hypothesis

statement that can be tested experimentally

independent variable

an experimentally manipulated variable

inference

an assumption based on your observations. cannot be seen directly

observation

something you can actually see, feel, hear, taste or smell. use senses directly.

prediction

a thing predicted; a forecast

sampling

test small group, assume it's true for everything

theory

broad and comprehensive statement of what is believed to be true, supported by considerable experimental evidence resulting or many tests of related hypothesis

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