CRAM Flashcards
What is sensitivity?
sensitivity is the ability to detect or sense stimuli in the internal or external environment and to make appropriate responses.
What is excretion?
The removal from organisms of toxic materials, the waste products of metabolism and substances in excess of requirements
What is egestion?
The passing out of undigested food through the anus
What is nutrition?
The taking in of materials for energy, growth and development.
What is a species?
A group of organisms that can reproduce to produce fertile offspring
What is the binomial system?
An internationally agreed system in which the scientific name of an organism is divided into two parts showing the genus and species
What is classification?
The way biologists group organisms to determine things like their family groups and species, evolutionary relationships and study their morphology and specific characteristics
What is the modern method of classification?
Base sequences in DNA. Groups of organisms that share a more recent ancestor have more similar base sequences meaning they are more closely related
What are the 5 main kingdoms?
- Animals
- Plants
- Fungi
- Prokaryotes
- Protoctists
What are the main features of reptiles?
- Cold blooded
- Have dry scaly skin
- Lay eggs on dry land
- (Snake, crocodile, lizards)
What are the main features of fish?
- Have scales on their bodies
- Have gills for breathing
- Cold blooded
- (Shark, tuna, salmon)
What are the main features of amphibians?
- Have moist, slimy skin
- Cold blooded
- Lay eggs in water
- (Frog, newt, salamander)
What are the main features of birds?
- Have feathers and wings
- Have beaks and lay eggs
- Warm blooded
- (Eagle, swan, sparrow)
What are the main features of mammals?
- Have fur or hair
- Feed young on milk
- Warm blooded
- external ears
- (Cow, human, bear)
What are the main groups of arthropods?
Arachnids, crustaceans, insects and myriapods
What is an arthropod?
All invertebrates with jointed legs, segmented bodies and a hard exoskeleton made of chitin
What is a virus’s structure?
Genetic material (RNA or DNA) inside a protein coat
What are the features of flowering plants?
- Reproduce sexually by means of flowers and seeds
- Seeds are produced inside the ovary found at the base of the flower
- Can be divided into two groups: monocotyledons and dicotyledons
What are the features of monocotyledons?
- Contain petals in a multiple of 3
- Leaves have parallel leaf veins
- Vascular bodies are randomly arranged
- Fibrous root system
What are the features of dicotyledons?
- Contains petals in multiples of 4 or 5
- Leaves have branched veins
- Vascular bodies arranged in rings
- Roots are taproot
What are the main features of insects?
Three body sections and six legs
What are the main features of arachnids?
Two body sections and eight legs
What are the main features of crustaceans?
two body sections and at least ten legs
What are the main features of myriapods?
Many segments with lots of legs