Answer:
3) Kingdom
Explanation:
Kingdom, Phylum, Class, Order, Family, Genus, and Species are the taxa of the taxonomic classification. As per taxonomic groups are given in the question, Kingdom is the most inclusive of the all taxonomic groups and species is the least inclusive. Thus, organisms from the same phylum all belong to the same taxon, the Kingdom.
Molecule is formed when atoms combine by covalent bonding. The molecule may be polar or non polar.
Different organisms have different number of chromosomes
Cell membrane allows some material to pass through it while on the same time it blocks other material from entering through it
Cajal cells are the neuromuscular type of cells conducting the slow electrical waves of small intestinal contraction during digestion.
Such are named by the man who discovered them, the worldly-famous Ràmon y Cajal.