Earth's outer layer is made of many very large sections of hard, solid rock called plates. Are there gaps between the plates?

What causes darkening of the skin as melanin production increases

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

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review