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In the above options, sperms are the haploid cells. In humans, haploid cells are those have only half the number of usual number of chromosomes. Sperm, gamates and egg cells are the haploid cells examples.

Karst topography is created by the chemical weathering of the rocks such as limestone, dolomite etc...

Rayon is a versatile fiber. Rayon is chemically Cellulose. It is widely claimed to have the same comfort properties as natural fibers, although the drape and slipperiness of rayon textiles are often more like nylon. It can imitate the feel and texture of silk, wool, cotton and linen. The fibers are easily dyed in a wide range of colors.

TON is the word which is the unit of weight. In forward it has weight of 1000 kgs and in backwords NOT which has no weight.

Add negative keywords to the ad group to reduce irrelevant impressions.