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Cells do not all carry out the same function even though they share similar structures.
a carbon atom can share electrons with up to four other atoms.
molecules
Structure is a better indicator of shared ancestry than function. When species share the same structure despite not needing similar structures functionally, it shows that there was almost definitely a common ancestor.
Molecules covalently bonded.
homologous structures is same structure,different function
Cells do not all carry out the same function even though they share similar structures.
They are 2-dimensional vectors.
They share two pairs of electrons and have 2 lone pairs
a carbon atom can share electrons with up to four other atoms.
By relating to their specific excretions. While they do share some excretory functions and products, the main function that they do not share is that stomach epithelial cells secrete hydrochloric acid.
Homologous structures.
molecules
No. When atoms share electron pairs they form covalent bonds. Isotopes are atoms having different numbers of neutrons.
that we share a common ancestor
Feathers
Homologous