STD 11 - 7. Structural organisation in animal — BIOLOGY STD 11 Science — Question

$(i)$ Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.

$(ii)$ Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.

$(iii)$ Flagella are comparatively longer and responsible for cell movement.

$(iv)$ Cilium and flagellum are covered with plasma membrane. Which of the above statements are correct?

$B.$ Selaginella is advance among pteridophytes as it produces seeds

$C.$ Pinus leaves are monomorphic, pinnate compound and have sunken stomata as adaptation against transpiration

$D.$ Sporic meiosis is characteristic of life cycle in many organisms like Volvox, Chlamydomonas and Ulothrix.