Unculturable organisms one: a. cannot be studied, as they cannot be sampled and grown in the lab. b. can be examined using bioinformatic approaches using nucleic acid sequences. c. are characterized by extreme niche preferences. d. are very rare.

Ur answer is A. cannot be studied, as they cannot be sampled and grown in the lab.

A. cannot be studied, as they cannot be sampled and grown in the lab.

Explanation:

Unculturable organisms are organisms that cannot be studied, as they cannot be sampled and grown in the lab. This organisms survived in certain conditions that cannot be replicated in the lab for proper study some of this conditions are high salinity, high pressure and high and low pH.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.