5. Which of the following is an example of active transport?
O
chromosomes migrating during cell division
O
water diffusion throughout the cytoplasm of a cell
O
cilia moving rapidly to propel a single-celled organism through water
proteins moving ions frun low to high concentration across a cell membrane

D (proteins moving ions from low to high concentration across a cell membrane)

Explanation:

Active transport, by definition, is a type of substance transport that requires energy (typically in the form of ATP). Having said that, we can immediately eliminate B (aka water diffusion throughout the cytoplasm of a cell), as diffusion (osmosis in this case) does not require any expenditure/spending of energy. Next, we can cancel A and C because although they do require energy, there is no transport involved. Thus that leaves us with D. D is not only the answer because of the process of elimination but also b/c the ans. choice says that ions are being moved from low to high concentration, which is against the concentration gradient and thus requires energy. Hope you found this helpful! :)

Which of the following is an example of active transport?

Cilia moving rapidly to propel a single-celled organism through water  proteins moving ions from low to high concentration across a cell membrane

Explanation:

Active transport involves movement of ions from a region of low concentration across a cell membrane to a region of high concentration

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

a. by using fur or clothes to trap heat energy near the body