The purpose of meiosis is to reduce the normal diploid cells (2 copies of each chromosome / cell) to haploid cells, called gametes (1 copy of each chromosome per cell). In humans, these special haploid cells resulting from meiosis are eggs (female) or sperm (male). In yeast cells, they are spores.
Third-party warrant is a derivative issued by the holders of the underlying instrument. Suppose a company issues warrants which give the holder the right to convert each warrant into one share at $500. This warrant is company-issued.
Unlike the rules-based classification schemes used in Europe, Brazil and other markets, medical devices in the US are classified using a predicate system. The US Food and Drug Administration (FDA) uses this predicate system to classify medical devices as Class I, II or III based on increasing risk.