BLG1501
Assignment 2
(COMPLETE ANSWERS)
Semester 1 2025
(225234)
DUE 11 April 2025
, ACTIVITIES
Question 1 [20] 1.1 Write explanatory notes on the greenhouse effect. (7) 1.2 Distinguish between
hypertonic, hypotonic, and isotonic solutions. (6) 1.3 Explain how edges and corridors can strongly
influence landscape biodiversity. (7) Question 2 [28] 2.1 Compare in tabulated form the processes of
fermentation and cellular respiration. (10) 2.2 Tabulate the key differences between mitosis and
meiosis. (12) 2.3 Define predation, herbivory and parasitism. (6) Question 3 [32] 3.1 In sesame plants,
the one-pod condition (P) is dominant to the three-pod condition (p). Normal leaf (L) is dominant to
wrinkled leaf (l). A homozygote in one-pod condition and normal leaves are crossed with a
homozygote in three-pod condition and wrinkled leaves. Use a Punnett square to predict the
phenotypic and genotypic ratios of the F2 generation. (20) 3.2 List the four major threats to
biodiversity and give an example of each. (12) Question 4 [20] 4.1 Explain the difference between
cytokinesis in plant and animal cells. (6) 4.2 Distinguish between asexual and sexual reproduction. (4)
4.3 Explain the general process of transcription, including the three major steps of initiation,
elongation and termination. (10)
Assignment 2
(COMPLETE ANSWERS)
Semester 1 2025
(225234)
DUE 11 April 2025
, ACTIVITIES
Question 1 [20] 1.1 Write explanatory notes on the greenhouse effect. (7) 1.2 Distinguish between
hypertonic, hypotonic, and isotonic solutions. (6) 1.3 Explain how edges and corridors can strongly
influence landscape biodiversity. (7) Question 2 [28] 2.1 Compare in tabulated form the processes of
fermentation and cellular respiration. (10) 2.2 Tabulate the key differences between mitosis and
meiosis. (12) 2.3 Define predation, herbivory and parasitism. (6) Question 3 [32] 3.1 In sesame plants,
the one-pod condition (P) is dominant to the three-pod condition (p). Normal leaf (L) is dominant to
wrinkled leaf (l). A homozygote in one-pod condition and normal leaves are crossed with a
homozygote in three-pod condition and wrinkled leaves. Use a Punnett square to predict the
phenotypic and genotypic ratios of the F2 generation. (20) 3.2 List the four major threats to
biodiversity and give an example of each. (12) Question 4 [20] 4.1 Explain the difference between
cytokinesis in plant and animal cells. (6) 4.2 Distinguish between asexual and sexual reproduction. (4)
4.3 Explain the general process of transcription, including the three major steps of initiation,
elongation and termination. (10)
