The blood group of sam’s father is a+ and that of his mother is b+. however, sam’s blood group is ab+. what is the correct explanation for this?

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

If a keystone species is removed from an ecosystem