taxonomic category that ranks below species, usually fairly permanent geographically isolated race. Smaller subsections of a genus (of plants, animals).

able to move smoothly along surface. (Mud or rock) to fall down a hill.

large flightless seabird of southern hemisphere, with black upper parts and white underparts and wings developed into flippers for swimming under water. Black and white sea birds that cannot fly.

person who is very knowledgeable about or skilful in particular area. Skillful people with special knowledge.

Not of the same kind; unlike other things.

forming or viewed as unit apart or by itself. individual items of clothing suitable for wearing in different combinations. To divide two things by being in between them.

Extremely amusing; very funny.

Study of past events as an academic subject.

To become fixed in place and hard to move.

Being what was wanted or needed. used to greet someone in polite or friendly way. Friendly greeting to someone who has arrived. To accept or receive something happily and gladly.

split into parts. To split numbers by another number, e.g. 6 / 2 = 3.

Smallest in height.

Putting similar items into groups or sets.

living organism. Living creatures that are not plants or people.