STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Mark the given statements True (T) or False (F).
(i) At present phylogenetic classification systems based on evolutionary relationships between the various organisms are acceptable.
(ii) Cytotaxonomy is carried out using computers and is based on all observable characteristics.
(iii) Numerical taxonomy is based on cytological information like chromosome number. structure and behaviour.
(iv) Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic organisms.
(v) In algae asexual reproduction occurs by the production of different types of spores, the most common being the zoospores.
(vi) Fusion of two gametes dissimilar in size, as in some species of Chalmydomonas is termed as Isogamous
(vii) Fusion between one large, non-motile female gamete and a smaller, motile male gamete is termed oogamous,e.g., Volvox, Fucus.
(viii) Algin is obtained from red algae but carrageen is obtained from brown algae.
(ix) At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis.
(x) Agar, one of the commercial products obtained from gelidium and gracilaria, are used to grow microbes and in preparations of ice creams and jellies.
(xi) Chlorella a unicellular algae, rich in proteins is used as food supplement even by space travellers.
(xii) Pyrenoids contain starch besides protein.
(xiii) Green algae usually have a rigid cell wall made of an inner layer of cellulose and an outer layer of pectose.
(xiv) Volvox, Kelp and Chara are examples of chlorophyceae (green algae).
(xv) The members of phaeophyceae are found primarily in marine habitats.