The diploid number of chromosomes in a species is always what

the same.

My explanation: Diploid is a cell or organism that has paired chromosomes, one from each parent. In humans, cells other than human sex cells, are diploid and have 23 pairs of chromosomes. Human sex cells (egg and sperm cells) contain a single set of chromosomes and are known as haploid.  Additionally, manipulation of chromosome number is routinely used by ... Chromosome Constitutions in a Normally Diploid Organism with Three Chromosomes ( ... can have a regular meiosis, although this is by no means always the case.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

explanation:

"do a testcross with a homozygous recessive plant."