BIOL 1202 Lecture : Notes Bio 1 19 12
Document Summary
Biological species concept-(when they mate do they make viable offspring) 2 individuals in the same area and species make viable offspring that are alive and reproductive themselves. Male and female must be close enough to come in contact. Dog and cat cannot make viable reproductive offspring. Sequence dna to determine if the same species. Meaning that over 99% of our dna is similar. Gorillas and other primates share less than 99% dna. Humans share similar dna with every living thing on the planet. Some non-living things use single or double stranded rna and are not considered living. (viruses) Because different rnas different proteins, and different species. Somewhere between 30 and 50 trillion cells in human body. Mitosis- from one cell makes people from an egg. Cell theory- cells on planet today did not spontaneously form, they come from pre-existing cells. All mammals share common characteristics and are related. (production of milk) All species share common ancestor from long ago.
