head end of bilateral animals where sensory organs are often located
anterior
500
Compare and contrast spontaneous generation and theory of biogenesis.
spontaneous generation: mistaken idea that life arises from nonlife
theory of biogenesis: idea that living things arise from other living things
both: ideas to explain how living things are formed
500
What are the three general environments were archaebacteria live?
1. hot, acidic: sulfur hot springs, thermal vents, volcanoes
2. high concentrations of salt: Great Salt Lake, Dead Sea
3. oxygen-free: swamps, bogs, volcanic vents
500
term describing the arrangement of an animal’s body structures is ___.
___: can be divided down the body’s length into two similar right and left halves
___: can be divided along any plane, through a central axis, into roughly equal halves