NATS 1675 Lecture Notes - Lecture 3: Dorsal Nerve Cord, Binocular Vision, Internal Fertilization
25 Apr 2015
School
Department
Course
Professor
Document Summary
Most organisms are born with radical mutations; do not survive long enough to pass the changes along the offspring. If something happens after birth it make affect you but could not be passed on; if you born with the mutation is would be likely to pass on. If an organism has a radical mutation survival can become difficult it is usually fatal. Some mutations are beneficial to the individual and eventually to the population, even if the population provides 1% advantage to the individual this means a 100 individual/offspring would survive as supposed to 99. About 80 generations the mutation will be replaced the original within the population as the normal type. If the environment stays the same evolution would be hardly seen. Kingdom animalia: multicellular, composed of eukaryotic cells, heterotrophs, characteristically ingest food. Phylum chordata: hollow dorsal nerve cord & notochord, complete digestive tract, large coelom (body) 4: about 33 animal phylis, 55. 000 species.
