Pnb 2250 exam 1 - Study guides, Class notes & Summaries

what animals must do? - - Mechanism for excreting waste - Mechanism for development and growth - Energy input Disadvantage of multicellularity - Need special cell/cell connections Need for cell/cell communication Need system for distribution of nutrients What traits to animals share? - Eukaryotic, heterotrophic, able to move Why is the fossil record incomplete? - Needs to die near water, fossilization process needs to be in a situation where there's no oxygen present, rapidly covered in...

What traits to animals share? -:- Eukaryotic, heterotrophic, able to move Cell to cell connections in plants -:- Plasmodesmo, flow of nutrients between cells Cell to cell connections animals -:- Tight junctions, strong connection Some multicellularity advantages -:- Cells have dedicated tasks (increase efficiency) Not all genes expressed (saves energy) Cells are further away from surface, ease on homeostasis Disadvantage of multicellularity -:- Need special cell/cell connections ...

Which statement is true? a. Heme is commonly found within seawater b. Heme-based proteins played a key role in the metabolism of carbon dioxide into forms less toxic to cells. c. Heme-based proteins likely developed as a means by which Fe was transported safely. d. Oxygen binding to heme is insensitive to the presence of acid in mammals. e. Early anaerobic life used heme-based proteins to minimize oxygen toxicity. -:- (e) Early anaerobic life used heme-based proteins to minimize oxyg...

cell to cell connection (in animals vs. plants) -:- plants = plasmodesmata, flow of nutrients between cells animals = tight junctions convergent evolution -:- organisms independently evolve similar traits as a result of having to adapt to similar environments limited solutions to the same problem analogous structures -:- flight in insects, bats, birds fingerprints in humans and koalas 2 | P a g e | G r a d e A + | 2 0 2 4 / 2 0 2 5 2 0 2 4 /2025 | © copyright | This work may n...

three frameworks of comparative systems - -Form & function of the parts under investigation -Phylogenetic diversity & evolution of the system in different taxa -Ecophysiology Tech designs vs living systems - -Technological advancement is an evolutionary progression -Organisms are impressive, beautiful & awe-inspiring >Exceedingly complex in architecture & functional adaptations >Appropriate to speak of life forms having "design" Emergent properties of animal physiology - - Atoms ...

PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+PNB 2250 EXAM 1 | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

Emergent properties of animal physiology -:- - Atoms - Molecules - Cells - Tissues - Organs - Integrated organ systems Physiological tolerances affects the _________ & ___________ of species. Physiology also influences higher levels of biological organization (4 things): -:- distribution, abundance -Population -Community -Ecosystem -Biome 2 | P a g e | G r a d e A + | 2 0 2 4 / 2 0 2 5 2 0 2 4 /2025 | © copyright | This work may not be copied for profit gain | Excel! Evolving...

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 Some multicellularity advantages - Answer-Cells have dedicated tasks (increase efficiency) Not all genes expressed (saves energy) Cells are further away from surface, ease on homeostasis Disadvant...

PNB 2250 Exam 1 (final exam prep) Study Guide cell to cell connection (in animals vs. plants) - Answer-plants = plasmodesmata, flow of nutrients between cells animals = tight junctions convergent evolution - Answer-organisms independently evolve similar traits as a result of having to adapt to similar environments limited solutions to the same problem analogous structures - Answer-flight in insects, bats, birds fingerprints in humans and koalas echolocation in bats, whales, shrews tru...

PNB 2250 EXAM 1 QUESTIONS AND ANSWERS | 100% PASS Which statement is true? a. Heme is commonly found within seawater b. Heme-based proteins played a key role in the metabolism of carbon dioxide into forms less toxic to cells. c. Heme-based proteins likely developed as a means by which Fe was transported safely. d. Oxygen binding to heme is insensitive to the presence of acid in mammals. e. Early anaerobic life used heme-based proteins to minimize oxygen toxicity. - Answer-(e) Early ana...