Presentations Pt. 6

Question 1

Specialized adapted gills aid in efficient ion regulation i.e chloride cells. T/F Explain.

Answer 1

T - hypertrophic ionocytes help active transport of ions across gill epithelium

Question 2

What mechanism aids in the conservation of water in hypersaline environments?
A. ionocytes
B. Thermoregulation
C. Mucus production
D. Specialized proteins
E. Low urine flow

Answer 2

C

Question 3

What are some behaviour changes of fish struggling in hypersaline environments? Provide 2 examples.

Answer 3

• reduce overall interest in feeding (reduced fitness and lower growth rates)
• begin to find other places to lay eggs

Question 4

What is paradoxical anaerobism, and what is the byproduct?

Answer 4

• ability to switch between stable aerobic and anaerobic respiration
• ethanol

Question 5

Heat Shock proteins do not prevent the misfolding of denaturing proteins. T/F Explain.

Answer 5

F - act as chaperones to assure proper folding of proteins

Question 6

What is an endemic species?
A. Species that are only found in certain locations, and are unable to relocate
B. Species that are able to relocate to new environments
C. Species that are forced to locate to new environments
D. Species that are non-native to their environments
E. Species that have a wide ranging distribution in diverse environments

Answer 6

A

Question 7

In pollution adapted Atlantic killifish, cardiovascular teratogenesis is more common than in Atlantic killifish who are not pollution adapted. T/F Explain.

Answer 7

F - adapted fish are resistant to teratogenesis

Question 8

What is a superfund site?

Answer 8

an area that is so heavily contaminated that environmental protection agencies step into to study and restore

Question 9

Developing physiological adaptations to pollution has had no survival costs for killifish. T/F Explain.

Answer 9

F - fitness is decreasing making them more vulnerable to other stressors