The nitrogen cycle could not exist without bacteria. Bacteria that lived inside the ground, catch the ntirogen that has been fixed and convert it into nitrate. This nitrate than used as a nutrients during photosynthesis from which the plants produce another fixed nitrogen and completed the cycle.
C. A seed grows
From the pollen
A heterotroph is an organism that cannot produce its own food. It has to eat/ consume other organisms to sustain its self. An omnivore is an animal that eats both plants and animals. It is a heterotroph because it must eat to live. Same with a carnivore, just that it only eats meat.
The answer is B. They have become habituated to human contact.
A chemical sedimentary rock?