What indication do we get by the reappearance of dwarf plants in the $F_{2}$ generation?

$A$ cross between a tall plant $(TT)$ and a short pea plant $(tt)$ resulted in progeny that were all tall plants because

Mendel crossed a pea plant having inflated green pod with a constricted yellow pod.
$(a)$ What type of a cross is it?
$(b)$ What type of plants are obtained in $F_{1}$ generation?
$(c)$ In $F_{2}$ generation the phenotype ratio is $9:3:3:1$. State the rule for the inheritance of traits observed by Mendel.

$(a)$ Why traits such as intelligence and knowledge cannot be passed on to the next generation?
$(b)$ How can we say that birds are closely related to reptiles and have evolved from them?

The differences observed among individuals are known as...

$(a)$ Differentiate between:
$(i)$ Homologous organs and Analogous organs
$(ii)$ Pollination and Fertilisation
$(b)$ What do fossils tell us about the process of evolution?