BIOLOGY TIMES — January 2018

(d) The gametophyte undergoes meiosis to produce spore The isolation of megasporocyte from the rest of the nucellar tissue begi ...

An improved variety of transgenic basmati rice (a) Gives high yield and is rich in vitamin A (b) Is completely resistant to all ...

Introduction Anatomy (Gk. ana-up, tome-cutting) is the study of internal structure of organisms. In plants, anatomy includes his ...

Meristematic tissues A major difference between plants and animals is that plant growth is not limited to an embryonic or juveni ...

ii) Macrosclereids:- Elongated & rod-like, eg:-epidermal covering of legume seeds. iii) Osteosclerids:- Bone-like with swoll ...

Depending upon thickenings , There are of three types: i) Angular Collenchyma:- The Thickenings are present at the angles. eg:- ...

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Complex Tissues They are permanent tissues which contain more than one type of cells. All the cells work as a unit. The common c ...

iii) Xylem or wood parenchyma They are small, thin/thick walled, living parenchymatous cells. Function: Stores food & someti ...

Wild animals kept in protected environments as shown in diagram below are: (a) Botanical garden (b) Museum (c) Herbaria (d) Zo ...

(a) A-Suctorial mouth, B-Hooks, C-Sucker, D-Segments (b) A-Sucker, B-Hooks, C-Suctorial mouth, D-Proglottids (c) A-Rostellum, B- ...

(c) Assertion is true but Reason is false. (d) Both Assertion and Reason are false. Match the source gland with its respective ...

Antibodies are produced by (a) Histiocytes (b) Mast cells (c) Plasma cells (d) Fibroblasts Blood pressure is lowest in (a) Vein ...

At the time of birth, presence of which antibody indicates the infection of foetus (Intrauterine infection) (a) IgG (b) IgD (c) ...

If a man Rh+ marries a woman Rh, then (a) First child will survive (b) First child will die (c) No child will be born (d) None ...

Match the following mineral elements with their deficiency symptoms and choose the correct option Column I Column II A. C ...

(a) 2.5 min (b) 2.5 hours (c) 2.5 seconds (d) 5.0 min Which bacteria nitrite is converted into nitrate? (a) Nitrobacter (b) Nit ...

Tissues : Meristematic and permanent tissues Pro Meristems can be distinguished from primary meristem by (a) Their apical posit ...

(d) Chlorophyll-containing phloem Annular or spiral thickening of lignin are present in (a) metaxylem (b)metaphloem (c) protoxy ...

Classification of various tissues is based on (a) Structure (b) Location (c) Type of cell (d) Both a& b The parenchyma ...