Answer:
They affect chemical reactions by lowering the activation energy, thus speeding up the reactions.
Symbiosis in lichens is the mutually helpful symbiotic relationship of greenalgae and/or blue-green algae(cyanobacteria) living among filaments of a fungus, forming lichen. The algaeor cyanobacteria benefit their fungalpartner by producing organic carbon compounds through photosynthesis
The answer is A:
The SUGAR-PHOSPHATE CHAINS form the sides, and the BASE PAIRS form the rungs
True ..In animals, the female mitotic sequence produces only one ovum; the other three haploid cells become "polar bodies".