The place where the electrical current starts, and which is considered the heart's pacemaker, is the...
sinoatrial node,
right atrium,
atrioventricular
Mode, or
left ventricle

Where is energy trapped inside the organelle chlorophyll

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab