Congruency and Similarity, Difference and types

Write one similarity and one difference between the chemistry of lanthanoids and that of actinoids.

Give one similarity and one difference between protocooperation and mutualism

Compare the crystals of copper and diamond giving one similarity and one difference.

A company produces 8 different types of candies, and sells the candies in gift packs. How many different gift packs containing exactly 3 different candy types can the company put on the market?

Name different types of RNA.

Triangles - Similarity & Congruency - Concept and Properties.

Similarity in organisms with different genotypes indicates :

Organs similar in function but different in internal structure are

In which type of reproduction genetically similar offsprings are produced ? Give reason.

What is immunity and different types of it ?