Week 7

Question 1

What are the 5 common problems faced by all animal species

Answer 1

1) Obtaining food. Locating, ingesting, and digesting.
2) Obtaining oxygen.
3) Homeostasis. Water, Temperature
4) Storing/excreting nitrogenous waste
5) Reproduce successfully.

Question 2

In what forms do Freshwater fish, seed-eating birds, and kangaroos excrete nitrogenous waste, and why they use this form?

Answer 2

Fish = Ammonia. Able t diffuse through gills.
Bird = Uric acid. Requires no water to process.
Kangaroo = Urea. Can be reused by gut bacteria to aid in protein synthesis.

Question 3

What is the difference between radial and bilateral symmetry.

Answer 3

Radial = symmetric no mater how you cut it through the middle.

Bilateral = Only symmetric if cut down the middle from dorsal to ventricle

Question 4

Why is the terrestrial environment the harshest of environments for life.

Answer 4

Supporting their body weight with out buoyancy.
Water loss.
Respiratory surfaces moved inside the body.
Converting to urea and uric acid excretion.