Using the rules for selecting symbols for the elements, which of the following could NOT be a correct symbol for a chemical element?

1.A
2.Ch
3.CA
4.Сс

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

The distribution of related animals and plants across the world

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.