1. Characteristics Of Living Or Flashcards
(15 cards)
Describe the characteristics of living organisms
Movement-an action by on organism or part of an organism causing a change of position or place
Respiration - the chemical reaction in cells that break down nutrient molecules and release energy for metabolisms
Sensitivity - the ability to detect and respond to changes in the internal or external environment
.growth-permanant increase in size and dry mass
Reproduction - the process that makes move of the same kind
Excretion- removal of waste products of metabolism and substance excess in requirement
Nutrition - taking in of materials for energy, growth and development
How ave organisms classified into groups
.by the features they shave
Describe species
Group of organisms that can reproduce to produce a fertile offspring
Describe the binomial system
An internationally agreed system in which the scientific name of an organism is made up of 2 parts showing the genus and species
Explain now classification system works in relation. To DNA
The similari y in DNA bases show which organism have a more recent ancestor ( are move closely related)
State the main features used to place organisms into the 5 kingdoms
Animals
Cells have a nucleus but no cell wall or chloroplasts
Feed on organic substance made by other animus
Have ribosomes and mitochondria
Plants
Cell wall made of cellulose
Often contain chloroplasts
Nucleus present
Feed by photosynthesis.
Fungi
Usually multicellular but yeast is unicellular
Nuclei and cell wall ( chitin) present
Does not have chlorophyl. l
Sapostrophic and heterotrophic
Reproduce by forming spores
Ribosomes present
Prokaryotes
Unicellular
No nucleus or mitochondria
Cell wall present
Often contain plasmids
Ribosomes present
Protoctists
Unicellular
May or way not have cell wall or chloroplasts
Nucleus present
Some feed by photosynthesis some feed on organic substances made by
Other organisms
Which kingdom has no nucleus present
Prokaryote
Main features used to place vertebrate
Fish.
Scaly skin
G ills to breath
Fins
Eggs with no shells
Amphibian - frogs
Skin with no scales
.tadpoles have gills frogs have lungs
Eggs have no shells and ave laid in water
Reptile-lizard
Scaly skin
Soft shelled eggs
Birds
Feathers _ beak - wings
Maintain. Constant body temp
Lay eggs with hard shell
Mammals
Different kind of teeth
Mammary glands
External ears
Fur
Sweat glands
Jointed legs on arthropods
Insect - 3 pairs of jointed leg
crustaceans- move than 4 pairs of jointed leg -
.arachnids - 4 pair of jointed legs
Myriapods- each boy segment was jointed legs
Number of antenna on arthropods
.insect _ one pair
Crustacecaus- 2 pair
Arachnids - no antenna
Myriapods - 1 pair
Common features of all arthropods
Exoskeleton
Several pairs on jointed leg
Segmented body
Classification between ferns and flowering plants
Ferns have feathery leaves -flowering plants have leaves
Ferns do not produce flowers and reproduce by spores
Flowering plants reproduce using flowers and seeds
Seeds produced inside the ovary
Difference between monocotyledon and dicotyledon
Mono. Di
one cotyledon 2 Cotyledon
Parallel veins. Branching veins
Narrow leaves. Broad leaves
Flower parts in In multiple of 4,5
Mukyipke of 3.
State the features of viruses
Contain genetic material inside a protein coat
Takes over host cells metabolic pathways to replicate themselves
Benefits of classifying organisms in a hierarchical system
Ability to explain evolutionary ‘ relationship
To anticipate and deal effectively with pathogens
To better understand diversity- and promote global biodiversity
