Q. Which one of the following pairs is wrongly matched?
NTA AbhyasNTA Abhyas 2020
Solution:
Viroids are the smallest known contagious pathogens. They are composed solely of a circular, single-stranded RNA short strand that has no protein coating. All known viroids are inhabitants of higher plants, and most of them cause diseases that differ widely in their economic relevance to humans.
Ginkgo are gymnosperms that have Archegonia as a female reproductive structure.
Salvinia is a water fern that is heterosporous in nature. The reproductive structures, microsporangia, and mega sporangia are carried within a special reproductive structure called sporocarp rather than prothallus.
Synergids are haploid cells next to the egg cells inside the embryo sac of dicots and monocots. Two synergids and one egg form Egg apparatus. The synergid helps in the entry of pollen tube by forming a structure called Filiform apparatus. The mustard plant is a dicot that contains synergids.
Ginkgo are gymnosperms that have Archegonia as a female reproductive structure.
Salvinia is a water fern that is heterosporous in nature. The reproductive structures, microsporangia, and mega sporangia are carried within a special reproductive structure called sporocarp rather than prothallus.
Synergids are haploid cells next to the egg cells inside the embryo sac of dicots and monocots. Two synergids and one egg form Egg apparatus. The synergid helps in the entry of pollen tube by forming a structure called Filiform apparatus. The mustard plant is a dicot that contains synergids.