Biology, an Environmental Approach: Diversity among living things
Before the middle of the nineteenth century, most of the animal phyla that we have discussed were recognized, but the ... we mentioned at the beginning of this chapter: to arrive at a convenient way to catalogue species, to keep track of them. ... Select ten pupils, including yourself, and construct a dichotomous key, using characteristics that will enable another person to identify each pupil in the group.
| Title | : | Biology, an Environmental Approach: Diversity among living things |
| Author | : | Biological Sciences Curriculum Study, Elizabeth Perrott |
| Publisher | : | - 1972 |
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