PNB 2250 Exam 1 Questions and
Answers |100% Pass
What traits to animals share? - Answer-Eukaryotic, heterotrophic, able to move
Cell to cell connections in plants - Answer-Plasmodesmo, flow of nutrients
between cells
Cell to cell connections animals - Answer-Tight junctions, strong connection
...
fossils are being pushed deep and deeper into the crust
Chanoflagelletes - Answer✔✔-around 665 million years old, not an animal but is
considered an ancestor to animals. They have cell adhesion, cell signaling and animal
specific genes
Anagenesis - Answer✔✔-species formation without branching of the evolutionary line
of descent.
How do animals evolve? - Answer✔✔-1. Heritable traits
2. Speciationm anagenesis, extinction
3. Adaptations to changing enivornments
- Different solutions to the same problems
- Change can be rapid
covergent evolution - Answer✔✔-when structures look the same and share a
common function but are not derived from a common ancestor, think of falcon (bird) ,
bats (mammal, pteridactyl (reptile)
PROOF THAT: limited possible solutions to problems faced by problems, evolution
drives these animals to the final solution
what animals must do? - Answer✔✔-- Mechanism for excreting waste
- Mechanism for development and growth
- Energy input
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