He observed 15 different finch species that originated as one ancestral bird. all differing in body shape, beak size, and mating habbits
Living things are identifiable by:
- movement (even cellular or internal movement)
- growth and development
- response to stimuli
- reproduction
- use of energy
- cellular structure
The answer is 90 and 140 mm Hg.
Fish are cold-blooded or poikilothermic, meaning that their body temperatures vary with the surrounding temperature. During the cold of winter fish become less active. They find little pockets out of the way of fast moving water where they can stay still and conserve energy.
