Help! Which statement about common descent is correct?

A Few species on Earth descended from a common ancestor; most life occurred independently. Few species on Earth descended from a common ancestor; most life occurred independently.

B All life on Earth descended from a common ancestor.

C Some species on Earth descended from a common ancestor; other species do not share any lineage.

D Most species on Earth descended from a common ancestor; some species do not share any lineage.

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

How do i turn 2 s into one in the products

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.