The flippers of a seal are modified .......

Define evolution and analogous organs.

Select the appropriate option for the work done by $Ernst$ $Haeckel$.

Which of the following sets contains vestigial organs in humans?

Define and explain the following terms: $1$. Analogous organs,$2$. Vestigial or rudimentary organs.

Read the following statements:
Statement $I$: All vertebrates develop a row of vestigial gill slits during the embryonic stage.
Statement $II$: Embryos always pass through the adult stages of other animals.
Which of the following options is correct with reference to these statements?