Chemical signaling molecules called neurotransmitters are released from nerve cells (neurons) through vesicles. This is an example of

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion