Fossil evidence indicates that several kinds of flightless dinosaurs possessed feathers. If some of these feather-bearing dinosaurs incubated clutches of eggs in carefully constructed nests, this might be evidence supporting the claim that
A) dinosaurs were as fully endothermal (warm-blooded) as modern birds and mammals.
B) their feathers originally served as insulation, and only later became flight surfaces.
C) the earliest reptiles could fly, and the feathers of flightless dinosaurs were vestigial flight surfaces.
D) the feathers were plucked from the bodies of other adults to provide nest-building materials.
E) all fossils with feathers are actually some kind of bird.
The patient is undergoing an allergy skin test by receiving subdermal inoculations of allergens. Inf
Habitat reconstruction is possible based on the kinds of plants present at past sites.
Evidence of Retrieval of Visual Memories of Movement
Common skin signs are often evidence of an illness or disorder. A scale is a thin, dry flake of ...
Piaget's research involved several kinds of conservation tasks
Fossil Skeleton: Ichthyosaur