Question

Which of the following statements about Cycas and Pinus is correct?

• A. The stem in Cycas is branched while it is unbranched in Pinus. The male and female strobili are present on the same plant in Pinus while they are present in different plants in Cycas.
• B. The stem in Cycas is unbranched while it is branched in Pinus. The male and female strobili are present on the same plant in Pinus while they are present in different plants in Cycas.
• C. The stem in Cycas is branched while it is unbranched in Pinus. The male and female strobili are present on the same plant in Cycas while they are present in different plants in Pinus.
• D. The stem in Cycas is unbranched while it is branched in Pinus. The male and female strobili are present on the same plant in Cycas while they are present in different plants in Pinus.

Answer 1

Answer: (B)

The main points of difference between Cycas and Pinus:
The stem is Cycas is unbranched, while it is branched in Pinus. Cycas shows coralloid roots with the symbiotic association with cyanobacterium Anabaena, while the roots of Pinus form mycorrhiza, which is a fungal association.
The male and female strobili are present on the same plant in Pinus (monoecious), while they are present in different plants in Cycas (dioecious).