Patients with indwelling catheters are susceptible to infections because a) injected solutions are contaminated. b) their immune systems are weakened. c) infections can be transmitted from other people. d) biofilms develop on catheters. e) bacteria cause infections.

(D) Bio films develop on catheters.

Hope this helped.

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: