Define the following terms:
$(a)$ Isogametes
$(b)$ Anisogametes

(N/A) Isogametes: These are gametes that are morphologically and physiologically similar,making it impossible to distinguish between male and female gametes. This condition is commonly observed in some algae like $Cladophora$.
$(b)$ Anisogametes: These are gametes that are morphologically and/or physiologically distinct. They differ in size,structure,or behavior,and are categorized into male and female gametes based on these differences.