Term | Definition |
ONE RR | Organisation, Nutrition, Excretion, Reproduction, Response |
Organisation | all living things have organised cells |
Unicellular | made of 1 cell only eg, Bacteria |
Multicellular | made of many cells eg human |
CTOS | Cells, Tissue, Organs, System |
Tissue | a group of cells working together to carry out a function,
in plants: Phloem, Xylem
in animals : muscle, connective |
Organs | a group of tissues working together to carry out a function
in plants : Leaf, root
in animals: heart kidney |
System | a group of organs working together to carry out a function
in plant: none
in animals: reproductive, digestive |
Nutrition | Way organisms obtain and use food |
Autotrophic | Produce own food |
Heterotrophic | do now produce own food |
Excretion | rid of waste products from metabolism |
reproduction | ability of organisms to make more organisms of the same typre |
asexual | involves 1 parent
doesn't involve gametes
less genetic variation
runners in strawberries |
sexual | involves 2 parents
fusion of gametes
more genetic variation
humans |
Response | way organisms react to changes in environment
plants: water, light, chemicals
animals: touch, heat, pain |
metabolism | all the chemical reactions in a cell or organism |
catabolic reaction | breaking down complex substances into simple ones eg digestion |
anabolic reaction | building simple substances into more complex ones eg Photosynthesis |
Life | anything which has the 5 characteristics of life |
Continuity of life | All living things arise from other living things of the same type.... also called BIOGENSIS |