A population.
A genus is a taxonomic rank that groups together closely related species that share similar characteristics. It is a level above the species rank and below the family rank in biological classification.
A taxon that includes all orders of similar species is called a class. It is a higher level in the classification system than an order and encompasses a broader range of organisms.
Species class is a taxonomic grouping used to categorize organisms based on shared characteristics, particularly in the context of biological classification. It helps scientists organize and group species with similar characteristics for easier study and understanding of relationships between different organisms.
The term fishes refers to more than one species of fish, as in "There are many species of fishes." That said you could have any of the combination. School of fish - a group of fish made up of a single species, School of fishes - a group of fishes made up of more than one species. Shoal of fish - group of fish of the same species moving in roughly the same direction. Shoal of fishes - group of fishes of different species moving roughly in the same direction.
A group of five musicians is known as a "quintet."
The groups each have different names. Group one is made up of Alkali Metals (except for Hydrogen). Group two is made of Alkali Earth Metals. The other groups include Transition Metals, Noble Gases, Poor Metals and Non Metals.
A taxon made up of similar species is called a genus. Genera are groups of closely related species that share common characteristics and are grouped together based on evolutionary relationships. Members of the same genus are more closely related to each other than they are to species in other genera.
A duet
a vocal quartet
probably "cells"
Elements in the same group have similar properties. The groups are made according to the properties of elements. Elements in a group have an equal number of valence electrons.
The COOH group can be changed to a tetrazole group to increase the drug's lipophilicity. Both groups have a similar pKa value so the ionisation of the molecules should be similar.