Question

Match the hominids with their correct brain size:

(a) Homo habilis	(i) 900 CC
(b) Homo neanderthalensis	(ii) 1350 CC
(c) Homo erectus	(iii) 650-800 CC
(d) Homo sapiens	(iv) 1400 CC

Select the correct options.
(A) a-iii, b-i, c-iv, d-ii
(B) a-iii, b-ii, c-i, d-iv
(C) a-iii, b-iv, c-i, d-ii
(D) a-iv, b-iii, c-i, d-ii

Answer 1

The volume of the human brain has increased as humans have evolved with the passage of time. The increment in brain size stopped with Neanderthals. One question that has frequently arises is the relation of brain size to intelligence.

Complete answer: Brain size has increased rapidly during human evolution due to the expansion of many brain regions, which results in human brains being exceptionally larger compared to that of primates.
The correct match would be:-

Hominids	Brain size
Homo habilis	650-800 CC
Homo neanderthalensis	1400 CC
Homo erectus	900 CC
Homo sapiens	1350 CC

Additional Information: The size of the brain is a very discussed topic study within the fields of anatomy and evolution. Brain size is sometimes measured in volume and sometimes by weight. The balance of findings for human brain size, largely based on participants of European ancestry, indicates an average adult brain volume of 1,260 cubic centimetres for men and 1,130 cubic centimetres for women. Right cerebral hemisphere is typically larger than the left, whereas the cerebellar hemispheres are typically closer in size. The adult human brain weighs on average about 1.5kg, that is, 3.3lb.

Hence, the correct answer is option (C). a-iii, b-iv, c-i, d-ii.

Note: Currently, Homo sapiens sapiens (present human) has the largest brain of any living hominid. In recent years, experiments have been conducted drawing conclusions to brain size in association to the gene mutation that causes microcephaly, which is a neural developmental disorder that affects cerebral cortical volume.