Presentations Pt. 5

Question 1

During the day, the seaweed in tide pools is not able to produce enough oxygen for the
organisms living in them. T/F Explain.

Answer 1

F - photosynthesize much more oxygen available than needed

Question 2

Which of the following is a consequence of human activity on tide pool ecosystems?
A. Increased fish population.
B. Enhanced water clarity.
C. Destruction of habitat and laid eggs.
D. Decrease in water temperature.
E. Increased aquatic plant population.

Answer 2

C

Question 3

How does the skin of intertidal fish help them in their environment?
A. By absorbing more toxins.
B. By increasing permeability to water.
C. By reducing membrane fluidity to avoid toxicity.
D. By emitting light to attract prey.
E. None of the options are correct.

Answer 3

C

Question 4

When the mangrove killifish is exposed to air, what growth appears in their gills?
A. Chromatophoroma
B. Neurofibroma
C. Sarcoma
D. Interlamellar cell mass
E. None of the above

Answer 4

D

Question 5

How does the mangrove killifish breathe while on land?

Answer 5

• Skin breathing (expand blood vessels)
• increase amount of Hb in blood
• thicker skin

Question 6

Mangrove killifish fertilize their eggs internal. T/F Explain.

Answer 6

T - self fertilization internally

Question 7

Why do icefish possess larger hearts and blood vessels than red-blooded fishes?

Answer 7

• allows them to circulate large volumes of blood at an increased flow rate with low vascular pressure

Question 8

What would happen to icefish if there were no antifreeze proteins present?

Answer 8

• temperature of ice formation would be at freezing point on their skin

Question 9

Having no hemoglobin (red blood cells) in their blood causes
A. an increase in blood viscosity
B. a decrease in blood viscosity
C. does not affect the viscosity at all
D. icefish do have hemoglobin in their blood.
E. none of the above

Answer 9

B