Which of these characteristics affects the diffusion of oxygen into the icefish’s blood?a. Icefish have scaleless skin. b.Icefish gills are white. c.Icefish have clear blood. d.Icefish hearts are colorless.

Option A; ICEFISH HAVE SCALELESS SKIN.

Explanation:

Icefish have more blood capillaries in their skin and fins which can absorb oxygen directly from the sea water. About 30-40% of the oxygen is absorbed across the skin, which is totally devoid of scales, making it thin to allow oxygen to diffuse across it more easily.

Icefish have transparent and scaleless skin and without scales, oxygen diffuses directly through Icefish skin. They also possess antifreezing protein which prevents the blood from freezing.

Therefore, ICEFISH HAVE SCALELESS SKIN and it is a characteristics that affects the diffusion of oxygen into the Icefish's blood.

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)