Activation energy is
-the energy lost or gained in a reaction.
-required to convert an endergonic reaction to an exergonic reaction.
-the energy required to bring molecules into a position where they can interact.
-the energy required for an endergonic reaction.

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

Where can dna be found in a prokaryotic cell