100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
PNB 2250 Exam 1 Questions And Answers Rated A+ $7.99   Add to cart

Exam (elaborations)

PNB 2250 Exam 1 Questions And Answers Rated A+

 8 views  0 purchase
  • Course
  • PNB 2250
  • Institution
  • PNB 2250

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? - Eukary...

[Show more]

Preview 2 out of 13  pages

  • September 16, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • PNB 2250
  • PNB 2250
avatar-seller
ACADEMICMATERIALS
PNB 2250 Exam 1
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 soil so overtime the soil compresses
them and forms rock



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




Reason cells/tissues are different - because the genes are expressed differently, muscle tissues are
different than skeletal tissues because of gene expression

, Earth also continues to move, easier to find fossils closer to the earths crust, older fossils are being
pushed deep and deeper into the crust



Chanoflagelletes - 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 - species formation without branching of the evolutionary line of descent.



How do animals evolve? - 1. Heritable traits

2. Speciationm anagenesis, extinction

3. Adaptations to changing enivornments

- Different solutions to the same problems

- Change can be rapid



covergent evolution - 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



why is immortality impossible? - because the universe doesn't have infinite amount of energy



Biochemistry is - universal, ATP is used everywhere, DNA/RNA shared



George Wald - Prevelance of CHNOPS, 96% of body mass



The chemistry is beneficial to life



Does the presence of an element in the body mean its essential to the body? - No, there has to be
a biological property for it to be essential to the animal

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICMATERIALS. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $7.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79271 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$7.99
  • (0)
  Add to cart