$A$ basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?

$(a)$ Explain why the wing of a bat and the wing of a bird are considered to be analogous organs.
$(b)$ List two factors that lead to the formation of a new species.

When a sperm carrying an $X$ chromosome fertilizes an ovum,what will be the sex of the embryo that develops from the zygote?

Select the statements that describe characteristics of genes:
$(i)$ genes are specific sequence of bases in a $DNA$ molecule
$(ii)$ a gene does not code for proteins
$(iii)$ in individuals of a given species,a specific gene is located on a particular chromosome
$(iv)$ each chromosome has only one gene

Which of the following pairs of organs are $NOT$ homologous organs?

What is the scientific name of the human species?