Species
Group of organisms that all share the same characteristics and are able to breed with each other.
What is variation in biological terms?
Differences between individual members of a species.
Tell one characteristic shared by all plants.
They make their own food through a process called photosynthesis.
Give three examples of molluscs.
Tell two characteristics shared by all fish.
They are aquatic animals.
They breathe through gills.
They have fins.
How do we call the offspring of two organisms of different species that have been able to breed together?
Hybrids
Suggest why scientists classify all domestic dogs in the same species, even though the different breeds of dog show so much variation.
Because they are able to breed with each other and produce fertile offspring.
What is the name of the group of plants that do not have leaves, roots, stems, flowers or seeds? They live in damp places and are very small in size.
Mosses
Earthworms and leeches belong to this group of invertebrates.
Annelids
Amphibians receive a specific name when they are young. What is this name and how is this stage of their life different from the adult form?
In case two organisms from different species are able to breed and produce offspring, tell an important characteristic this offspring will have.
They will be infertile.
What is the name of the chart in which we can keep a tally of the number of different characteristics present in a group of organisms?
Frenquency diagram
Ferns do not produce seeds. What are the name of the structures they use to reproduce?
Spores
Give two characteristics shared by all arthropods.
They have jointed legs.
They have an exoskeleton.
Reptiles are vertebrates with scaly skin. Give six examples of reptiles.
Snakes, crocodiles, alligators, turtles, tortoises, iguanas, chameleons, lizards, comodo dragons.
What was the name of the Swedish scientist who invented the two name system to name every organism?
Carl Linnaeus.
A boy collected 8 branches from one species of tree. He counted the number of berries on each branch:
7, 8, 6, 7, 7, 4, 5, 8
What is the overall range of the number of berries?
4 to 8
They reproduce by seeds which are found inside cones.
Which is the only terrestrial crustacean in the world?
Woodlice.
Tell three characteristics that make an organism a bird.
Body is covered with feathers.
They have a beak.
The front limbs have develop into wings.
Explain why lions and tigers belong to different species, even though they can sometimes breed together.
They show different characteristics and their offspring is infertile.
A boy collected 8 branches from one species of tree. He counted the number of berries on each branch:
7, 8, 6, 7, 7, 4, 5, 8
What are the median, mode, and mean for the number of berries in the branches?
median = 6
mode = 7
mean = 6.5
Tell four organs that flowering plants present.
Roots
Stems
Leaves
Flowers
Fruits
Give the names of the four groups of arthropods studied in class and tell how many pair of legs each one has.
Insects- three pairs of jointed legs
Arachnids- four pairs of jointed legs
Crustaceans- five pairs of jointed legs
Myriapods- many pairs of jointed legs
1. animals
2. vertebrates
3. mammals
1. They do not produce their food by the process of photosynthesis.
2. They have bones and a backbone.
3. They feed their young with milk from the mother and the body is covered with hair.