What does bacteria moving around remind you off?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?