The cause of aging in mammals,including humans,is:

Neoteny is found in

Which of the following arrangements of periods of the Mesozoic era gives a correct sequence from the earliest to the latest?

Match the scientists with their respective contributions: Hugo de Vries,Hardy-Weinberg,and Ernst Haeckel.

Match the columns:

Column-$I$	Column-$II$
$(1)$ Human embryos have gill	$(a)$ Chemical evolution
$(2)$ Oparin and Haldane	$(b)$ Simulation experiment
$(3)$ Miller and Urey	$(c)$ Wings of bird and butterfly
$(4)$ Analogous organ	$(d)$ Ontogeny repeats phylogeny

Assertion: From an evolutionary point of view,the human gestation period is believed to be shortening.
Reason: One major evolutionary trend in humans has been the larger head undergoing a relatively faster growth rate in the foetal stage.