Biology Chapter 1 Fib

Front 1

unicellular

Back 1

Some organisms are composed of only one cell. These organisms are called ___ organisms.

Front 2

multicellular

Back 2

Most of the living things that you see around you are ___ organisms. That is, they are composed of more than one cell.

Front 3

differentiation

Back 3

The cells of multicellular organisms undergo ___. That is, they become different from each other as they multiply and follow the various roles supplied for them by their genetic instructions.

Front 4

sexual

Back 4

In ___ reproduction, hereditary information form two parts of a single organism or from two organisms of the same species is combined.

Front 5

asexual

Back 5

___ reproduction is the production of offspring that does not involve the union of gametes.

Front 6

natural selection

Back 6

According to the theory of evolution by ___, organisms that have certain favorable traits are better able to successfully reproduce than organisms that lack these traits.

Front 7

photosynthesis

Back 7

Through the process of ___, plants and some types of unicellular organisms capture the energy from the sun and change it into a form of energy that can be used by living things.

Front 8

cells

Back 8

All living things are composed of ___.

Front 9

metabolism

Back 9

All living things use energy in a process called ___, which is the sum of all of the chemical processes that occur in the organism.

Front 10

observation

Back 10

___ typically employs one or more of the five senses to perceive objects or events.

Front 11

sampling

Back 11

Scientific ___ is the technique of using a small part to represent an entire population.

Front 12

control group

Back 12

A ___ is a group of individual that serves as a standard of comparison with another group individual to which it is identical excpet for one factor.

Front 13

independent variable

Back 13

The ___ is an experimentally manipulated variable.

Front 14

dependent variable

Back 14

The ___ is the responding variable is an experiment.

Front 15

analyzing data

Back 15

___ is the process of determining whether data are reliable and whether they support or do not support a hypothesis or prediction.

Front 16

model

Back 16

A ___ is essentially an explanation supported by data. It can be visual, verbal, or mathematical.

Front 17

inference

Back 17

A ___ is a conclusion made on the basis of facts or premises rather tahn on direct observations.

Front 18

theory

Back 18

A ___ is a broad and comprehensive statement of what is thought to be true.

Front 19

light microscope

Back 19

Biologists typically use the compound ___ to see small organisms and cells.

Front 20

electron microscopes

Back 20

To examine specimens even smaller than cells, such as cell parts or viruses, scientists may chose from several types of ___.

Front 21

transmission electron microscope

Back 21

The ___ transmits a beam of electrons through a very thinly sliced specimen.

Front 22

scanning electron microscope

Back 22

The ___ provides striking three-dimensional images.

Front 23

stage

Back 23

To be viewed with a compound light microscope, a specimen is mounted on a glass slide. The slide holding the specimen is placed over the opening in the ___ of the microscope.

Front 24

objective lens

Back 24

When using a compound light microscope, light passes through the specimen and through the ___, which is positioned directly above the specimen.

Front 25

ocular lens

Back 25

When using a compound light microscope, the objective lens enlarges the image of the specimen. This magnified image is projected up through the body tube to the ___ in the eyepiece, where it is magnified further.

Front 26

nosepiece

Back 26

Most light microscopes have a set of objective lenses with different powers of magnification. These lenses can be rotated into place by revolving the ___.