Question

the icefish lacks hemoglobin in its blood, enabling survival in extreme cold.
non - random mating occurs when individuals choose mates based on specific.
the amish community in the united states represents a scenario of the effect.

Explanation:

1. Antarctic icefish have adapted to cold - water environments by lacking hemoglobin in their blood.
2. Non - random mating often occurs based on specific traits like physical appearance or behavior.
3. The Amish community is an example of the founder effect as they are a small, isolated group with a distinct genetic makeup due to a small founding population.

Answer:

1. Antarctic
2. traits
3. founder