An uncharged atom of calcium has an atomic number of 20 and an atomic mass of 43. How many electrons does calcium have?

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?

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