Scientists Know That Birds Began to Evolve Prior to the Cretaceous

question 90

Short Answer

Scientists know that birds began to evolve prior to the Cretaceous, evidenced the fossil known as ____________________.

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Definitions:

Transpiration

The process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.

Evaporation

The process by which liquid water turns into water vapor, removing heat from the environment, which can cool surfaces.

Venation Patterns

The arrangement of veins in a leaf or insect's wing, which can be used for identification and classification purposes.

Eudicots

One of the two major groups of flowering plants, characterized by having two cotyledons (seed leaves), net-veined leaves, and flower parts usually in multiples of four or five.