Tiktaalik
An intermediate form categorized between fish and tetrapods
paleontology
The study of past geological periods through the examination and analysis of fossils.
aerobics
Occurring only as the result of the presence of oxygen.
genome
The genetic material of an organism.
mutation
An unexpected and significant alteration in the evolutionary process.
cartilage
Elastic bone-like skeletal tissue.
benign
Lacking evil or wicked intentions; harmless.
lampoon
To make fun of; to satirize or parody.
demarcation
The point of separation, differentiation or segregation.
axiomatic
A truth that is self-evident.
boon
Something that is beneficial to the current need or requirement.
occlusion
An obstruction or blockage.
onerous
Burdensome or tediously difficult.
coccyx
Tailbone.
appendage
A limb; an accessory; an add-on.
collagen
Fibrous proteins found in connective tissue capable of yielding gelatin and glue when boiled.
embryonic
The initial stages of development and growth.
