When the sperms of Funaria and Pteris are put together near the archegonia of Pteris, only the sperms of Pteris readily enter the archegonia and reach the egg. The reason being that
(a) Sperms of Funaria are killed when mixed with sperms of Pteris
(b) Archegonia of Pteris secrete a substance with repels sperms of Funaria
(c)Archegonia of Pteris secrete a chemical substance which attracts sperms of Pteris chemotactically
(a) Aseptate and multinucleate (b) Septate and multinucleate (c) Aseptate and uninucleate (d) Septate and uninucleate Answer. (b) The mycelium of Aspergillus consist of branch septate hyphae. Cells of hyphae are multinucleate. (185)
(a) Parenchyma (b) Chlorenchyma (c) Plectenchyma (d) Collenchyma Answer. (c) Plectenchyma (Pseudoparenchyma) is nothing but the interwoven mass of fungal mycelium which in cross-section look like parenchyma. (108)
(a) Colletotrichum falcatum (b) Phytophthora infestans (c) Potato mosiac virus (d) Alternaria solani Answer. (b) Late blight of potato is a seed born disease which is caused by Phytophthora infestans. The disease is characterised by brownish to blackish dead areas …
