Absorptive cells- Form the walls of the intestines
epithelial cells- Form skin, body cavities, and some organs
Secretory cells- Glands (Sweat)
Nerve cells- Form the nervous system
Sensory cells- Conveys sensory information to the brain (light, smell, taste, ect.)
Muscle cells- Form muscles (body and organs)
Reproductive cells- Allow for reproduction or furthering of the species
geological isolation, if the birds that develop mutations do not have any competition they can survive.
Answer:
Greenhouse gases are good because they keep the Earth warm. They trap the heat energy that is radiated from the Earth in the atmosphere. Without greenhouse gases, the Earth would have an average yearly temperature of 0 degrees Celsius.