The purple martin is a bird that eats insects. In terms of systems, why would the sudden elimination of this species be a problem? 1. The make up part of a negative feedback system that promotes insect population growth.

2. They make up part of a positive feedback system that promotes insect population growth.

3. They make up part of a negative feedback system that regulates insect population size.

4. They make up part of a positive feedback system that regulates insect population size.

Mutations associated with albinism affect proteins involved in synthesis

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

Which of the following is a testable hypotheses?