Hepatologists: Physicians who specialize in the treatment of people with liver diseases. ... PAs practice medicine under the supervision of a physician. They take medical histories, provide diagnostic screenings, order and interpret tests, prescribe medication and perform medical procedures.
Mainly because of time. The precambrian era started millions of years ago, and organisms didn't have enough time to change and adapt to form new species, since this is something that takes a long time to occur.
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BioTeacher101
Answer:
During photosynthesis, molecules in leaves capture sunlight and energize electrons, which are then stored in the covalent bonds of carbohydrate molecules. That energy within those covalent bonds will be released when they are broken during cell respiration
Innate behavior is a behavior manifested that has not been taught nor learned. It is based on their basic instinct.
examples of innate behaviors are:
1) The spider weaving its web. It is not taught nor learned from experience. It has been inculcated in its mind since birth. The spider instinctively knew that to have its food, it must build a web where the food will be trapped.
2) The dog drooling when it is faced with food. It is an instinctive response when it sees food, one it particularly loves.