Bio Logy

Front 1

Movement

Back 1

An action by an organism or part of an organism causing a change of position or place.

Front 2

Respiration

Back 2

The chemical reactions in cells that break down nutrient molecules and release energy for

metabolism.

Front 3

Sensitivity

Back 3

The ability to detect or sense stimuli in the

internalm or external environment and to make appropriate responses.

Front 4

Growth

Back 4

A permanent increase in size and dry mass by an increase in cell number or cell size or both.

Front 5

Reproduction

Back 5

The processes that make more of the same kind of organism.

Front 6

Excretion

Back 6

Removal from organisms of the waste products of metabolism (chemical reactions in cells

including respiration), toxic materials and

substance in excess of requirements.

Front 7

Nutrition

Back 7

Taking in of materials of energy, growth and

development; plants require light, carbon

dioxide, water and ions; animals need organic compounds and ions and usually need water.

Front 8

Tissue

Back 8

A group of cells with similar structures,working together to perform a shared function.

Front 9

organ

Back 9

a structure made up of a group of tissue, working together to perform specific functions.

Front 10

organ system

Back 10

a group of organs with related functions, working together to perform body functions.

Front 11

osmosis

Back 11

the diffusion of water molecules from a region of higher water potential (dilute solution ) to a region of lower water potential (concentrated solution) .

Front 12

active transport

Back 12

the movement of molecules and ions in or out of a cell through the cell membrane against a concentration gradient using energy from respiration.

Front 13

cell structure

Back 13

all organisms are made of cells. Cells are very small so large organisms contain millions of cells.

Front 14

microscopes

Back 14

to see clearly, you need to use microscope.

Front 15

cell membrane

Back 15

whatever sort of animal or plant they come from , all cells have a cell membrane.

Front 16

cell wall

Back 16

all plant cells are surrounded by a cell wall made mainly of cellulose.

Front 17

cytoplasm

Back 17

cytoplasm is a clear jelly. It is nearly all water about 70% is water in many cells.

Front 18

vacuoles

Back 18

A vacuole is a space in a cell, surrounded by a membrane, and containing a solution.

Front 19

chloroplasts

Back 19

chloroplasts are never found in animal cells, but most of the cells in the green parts of plants have them.

Front 20

nucleus

Back 20

the nucleus is where the genetic information is stored.

Front 21

mitochondria

Back 21

photographs of cells taken using an electron microscope.

Front 22

ribosomes

Back 22

even tinier structures than mitochondria can just be seen with an electron microscope.

Front 23

diffusion

Back 23

the net movement of molecules and ions from a region of their higher concentration to a region of their lower concentration down a concentration gradient.