POUL 1010E EXAM 1 EXAM SCRIPT 2026
FULL QUESTIONS AND ACCURATE
ANSWERS GRADED A+
●● Reasons for the lack of bird fossils.
Answer: - *Their remains are scattered because, as prey animals, their
remains can end up scattered and further scavenged by other animals*
- Bones are porous and small in size
- Fossils are usually found near volcanoes
●● Archaeopteryx.
Answer: - It was the size of a pigeon, tooth jawed, and had wing like
feathers similar to the modern day bird
- From the Jurassic Period, 150 million years ago
- First fossil animal with feathers
- Had a long bony tail blooded
- *Hollow bones*
●● Confuciusornis.
Answer: - *Based on fossil evidence it is the first bird with a horny
beak*
- Lived 120-125 million years ago
, - Had pygostyle (bone that supports tail feathers) and long, central tail
feathers
- Likely a glider, limited flight capability
●● The evolutionary advantages (functions) for the development of
feathers.
Answer: *Insulation* - Thermoregulatory control of body temperature
*Camouflage and/or social signaling* - Feathers contained melanosomes
( Pigmented color and iridescence)
-- Tail feathers to display sexual dimorphism and/or anti-predator
defense mechanism (stress induced shedding of tail feathers)
●● Arboreal (origin of flight).
Answer: Lived in trees and stared flying by gliding down from branch to
branch or tree to tree
●● Cursorial (origin of flight).
Answer: Implies that basal bird species ran along the ground with their
forearms outstretched for balance as they pursued prey or ran from
predators. Forearms covered with feathers would have increased lift, and
as these feathers grew longer and stronger, more lift would have been
generated until the animal was off the ground
●● Convergent evolution.
FULL QUESTIONS AND ACCURATE
ANSWERS GRADED A+
●● Reasons for the lack of bird fossils.
Answer: - *Their remains are scattered because, as prey animals, their
remains can end up scattered and further scavenged by other animals*
- Bones are porous and small in size
- Fossils are usually found near volcanoes
●● Archaeopteryx.
Answer: - It was the size of a pigeon, tooth jawed, and had wing like
feathers similar to the modern day bird
- From the Jurassic Period, 150 million years ago
- First fossil animal with feathers
- Had a long bony tail blooded
- *Hollow bones*
●● Confuciusornis.
Answer: - *Based on fossil evidence it is the first bird with a horny
beak*
- Lived 120-125 million years ago
, - Had pygostyle (bone that supports tail feathers) and long, central tail
feathers
- Likely a glider, limited flight capability
●● The evolutionary advantages (functions) for the development of
feathers.
Answer: *Insulation* - Thermoregulatory control of body temperature
*Camouflage and/or social signaling* - Feathers contained melanosomes
( Pigmented color and iridescence)
-- Tail feathers to display sexual dimorphism and/or anti-predator
defense mechanism (stress induced shedding of tail feathers)
●● Arboreal (origin of flight).
Answer: Lived in trees and stared flying by gliding down from branch to
branch or tree to tree
●● Cursorial (origin of flight).
Answer: Implies that basal bird species ran along the ground with their
forearms outstretched for balance as they pursued prey or ran from
predators. Forearms covered with feathers would have increased lift, and
as these feathers grew longer and stronger, more lift would have been
generated until the animal was off the ground
●● Convergent evolution.
