Evolution of human appears parallel to the progressive development of brain and language skills. As such, the evolution of individual species in the sequence of their appearance is:
Ramapithecus → Homo habilis → Homo erectus → Neanderthal → Homo sapiens
Homo sapiens → Ramapithecus → Homo habilis → Neanderthal → Homo erectus
Homo habilis → Homo erectus → Ramapithecus → Neanderthal → Homo sapiens
Neanderthal → Ramapithecus → Homo habilis → Homo erectus → Homo sapiens
The flightless bird with forelimbs modified as paddle-like structures suited for swimming is known as:
Struthio
Neophron
Aptenodytes
Psittacula
Choose the correct statements regarding population interactions between two species.
A. In both parasitism and commensalism, only one species benefits and the other species is harmed.
B. Both species benefit in mutualism.
C. Both species benefit in commensalism.
D. In parasitism, only one species benefits and the other species is harmed.
E. In amensalism, one species is harmed and the other is unaffected.
Choose the correct answer from the options given below:
B and E only
A and B only
B, D and E only
A and D only
Select the reagents that reduce nitriles to primary amines.
A. (i) $\mathrm{LiAlH}_4$; (ii) $\mathrm{H}_2 \mathrm{O}$
B. $\mathrm{Sn}+\mathrm{HCl}$
C. $\mathrm{H}_2 / \mathrm{Ni}$
D. $\mathrm{Na}(\mathrm{Hg}) / \mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$
E. $\mathrm{Br}_2 / \mathrm{aq} . \mathrm{NaOH}$
Choose the correct answer from the options given below.
B, D and E only
A, C and D only
A, D and E only
A, B and C only
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