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Question 11 Mark

Arrange and Rewrite :
Australopithecus, Cro-Magnon, Homo erectus, Neanderthal man.

Answer

Australopithecus, Homo erectus, Neanderthal man, Cro-Magnon.
Explanation:
This is the sequence of evolution of modern man through various stages.

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Question 21 Mark

Choose the Odd One Out :
Use and disuse of organs, Overuse of organs, Acquired characters, Natural selection.

Answer

Natural selection Category : Lamarck's theory

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Question 31 Mark

Choose the Odd One Out :
Natural selection, Survival of fittest, Variations, Overuse of organs.

Answer

Overuse of organs Category : Postulates of Darwinism

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Question 41 Mark

Choose the Odd One Out :
Neanderthal man, Cro-Magnon man, Modern man, Tuang child.

Answer

Tuang child Category : Human evolution

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Question 51 Mark

Choose the Odd One Out :
Java ape man, Peking man, Cro-Magnon man, Homo erectus.

Answer

Cro-Magnon man Category : Grouped under mid pleistocene epoch

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Question 61 Mark

Choose the Odd One Out :
Australopithecus, Homo habilis, Tuang child, Homo erectus.

Answer

Tuang child Category : Human evolution

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Question 71 Mark

Choose the Odd One Out :
Pinna, Diaphragm, Vermiform appendix, Wisdom teeth.

Answer

Diaphragm Category : Vestigial organs

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Question 81 Mark

Arrange and Rewrite :
Recognition of Homo habilis as an early tool user $\rightarrow$ Realisation of Neanderthals as a distinct human species$\rightarrow$ Discovery of Australopithecus fossils $\rightarrow$ Identification of Homo erectus as a traveller and hunter.

Answer

Discovery of Australopithecus fossils $\rightarrow$ Recognition of Homo habilis as an early tool user $\rightarrow$ Identification of Homo erectus as a traveler and hunter $\rightarrow$ Realisation of Neanderthals as a distinct human species.
Explanation :
The discovery of Australopithecus fossils shed light on early human ancestry, followed by Homo habilis, noted for early tool use. Homo erectus was recognised for geographic spread and hunting skills, while Neanderthals' identification as a distinct species enriched our understanding of human evolutionary diversity

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Question 91 Mark

Arrange and Rewrite :
Inherited longer necks in giraffes $\rightarrow$ Stretching for higher leaves $\rightarrow$ Transmitting acquired traits to offspring.

Answer

Stretching for higher leaves $\rightarrow$ Inherited longer necks in giraffes $\rightarrow$ Transmission of acquired traits to offspring.
Explanation:
According to Lamarck's theory, giraffes stretched their necks to reach higher leaves, a behaviour that led to the development of longer necks over generations. These acquired longer necks were then passed on to the offspring, demonstrating the theory of inheritance of acquired characteristics.

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Question 101 Mark

Arrange and Rewrite :
Homo habilis $\rightarrow$ Australopithecus $\rightarrow$ Homo erectus $\rightarrow$ Cro-Magnon $\rightarrow$ Homo sapiens sapiens $\rightarrow$ Neanderthal.

Answer

Australopithecus $\rightarrow$ Homo habilis $\rightarrow$ Homo erectus $\rightarrow$ Neanderthals $\rightarrow$ Cro-Magnon $\rightarrow$ Homo sapiens sapiens.
Explanation:
This sequence represents the chronological order of human ancestors, starting with the earliest known hominids, Australopithecus, and progressing to modern humans, Homo sapiens sapiens.

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Question 111 Mark

Arrange and Rewrite :
Forehead and brow ridges $\rightarrow$ Development of chin $\rightarrow$ Reduction of size of canine teeth $\rightarrow$ Bipedalism.

Answer

Bipedalism $\rightarrow$ Forehead and brow ridges $\rightarrow$ Reduction of size of canine teeth $\rightarrow$ Development of chin.
Explanation:
Bipedalism initiated key evolutionary adaptations, followed by changes in skull structure like forehead and brow ridges. Subsequent reductions in canine teeth size indicated dietary shifts and the development of the chin marked further refinements in human facial evolution.

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Question 121 Mark

Arrange and Rewrite :
Struggle for existence $\rightarrow$ Survival of the fittest $\rightarrow$ Variation in traits $\rightarrow$ Inheritance of advantageous traits.

Answer

Variation in traits $\rightarrow$ Struggle for existence $\rightarrow$ Survival of the fittest $\rightarrow$ Inheritance of advantageous traits.
Explanation:
Darwin's theory begins with the variation in traits within a population. This leads to a struggle for existence, where individuals with advantageous traits (survival of the fittest) are more likely to survive and reproduce, passing these traits to the next generation.

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Question 131 Mark

Arrange and Rewrite :
Reduction of the size of canine teeth $\rightarrow$ Increasing_Cranial capacity $\rightarrow$ Forehead and brow ridges $\rightarrow$ Reduction in body hair.

Answer

Increasing Cranial capacity $\rightarrow$ Forehead and brow ridges $\rightarrow$ Reduction of size of canine teeth $\rightarrow$ Reduction in body hair.
Explanation:
The increase in cranial capacity is a fundamental early step in human evolution, linked to brain development. The evolution of forehead and brow ridges signifies changes in skull structure. The reduction of canine teeth size indicates dietary changes and further evolution of the skull. The reduction in body hair is a later evolutionary adaptation, possibly related to environmental changes.

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