Research has shown that in a number of genes the sequence of nucleotides is unique to humans and is not found in chimpanzees - VCE - SSCE Biology - Question 38 - 2013 - Paper 1

The question presents several statements about human capabilities in comparison to chimpanzees. To evaluate these, we will analyze the roles of the unique genes listed in the table and their implications:

1. Can digest milk sugar only in infancy: This statement is incorrect. The gene LCT indicates that humans can digest milk sugar (lactose) in adulthood, suggesting this ability continues beyond infancy.

2. Have less-opposable thumbs than chimpanzees: This statement is misleading. The HAR2 gene is involved in the development of wrist and thumb movement, which suggests that humans have evolved to have more dexterous thumbs than chimpanzees.

3. Are able to walk on two feet in an upright position: While the table discusses brain functions and digestion, it does not address bipedalism directly, making this statement unverifiable based on the provided data.

4. Process and remember more complex information than chimpanzees: The gene HAR1 is involved in brain development, potentially contributing to complex cognitive functions. This implies that humans can process and remember more complex information compared to chimpanzees.

Given this analysis, the most reasonable conclusion is D. process and remember more complex information than chimpanzees.