EVERYDAY SCIENCE

Detailed explanation-1: -Adiantum is a pteridophyte whereas Cycas is a primitive gymnosperm. They both possess multiciliated motile sperm. The sperm easily move towards the egg inside the ovule and fertilize it.

Detailed explanation-2: -Cycas and Adiantum both produce ciliated sperms. These are motile sperms.

Detailed explanation-3: -Cycas is a gymnosperm while Adiantum is a pteridophyte. Cambium and seeds are absent in pteridophytes. Vessels are absent in both gymnosperms and pteridophytes. The common feature among both of them is the presence of ciliated sperms.

Detailed explanation-4: -Hint: Adiantum is a pteridophyte while Cycas belongs to gymnosperms. Adiantum is also called maidenhair fern. Cycas belong to a class i.e. gymnosperms which literally means naked seeds.

Detailed explanation-5: -Adiantum known as Maiden hair fern is a pteridophyte resembles cycas (gymnosperm) in having motile sperm. Seeds, cambium are common in gymnosperms and absent in pteridophytes.