Which one is the most striking or common character of the vertebrates?

$(a)$ What is the significance of binomial nomenclature?
$(b)$ Who introduced the system of scientific naming?
$(c)$ Write any two conventions followed while writing the scientific names.

Charles Darwin first described the idea of evolution in his book "The Origin of Species". Define the concept of evolution.

State whether the following statement is true or false:
The animals belonging to phylum Nematoda contain only tissues and no real organs.

Fungi are heterotrophic eukaryotic organisms and have a cell wall made of chitin. Name five cell organelles that are present in the fungal cell. Also,state two structural differences between a plant cell and a fungal cell. Which life form occurs due to the association of cells of fungi and algae?

Give one example of each:
$(a)$ Reptile which has a four-chambered heart.
$(b)$ Egg-laying mammal.
$(c)$ Parasitic Platyhelminthes.
$(d)$ Division among plants which has the simplest organisms.