1 - 20 of 360 MCQs found

During unfavourable condition, slime moulds

(A)   form fruiting bodies bearing spores at their tips
(B)   form an aggregation called plasmodium
(C)   form an aggregation called pseudoplasmodium
(D)   Both A and B are correct

Which of the following is wrong about protista?

(A)   Protistans are both autotrophic and heterotrophic
(B)   Some protists have cell walls
(C)   Protists does not have membrane bound organelles
(D)   All of the above

Which is incorrect about phycomycetes?

(A)   Mycelium is aseptate and coenocytic
(B)   A zygospore is formed by fusion of gametes
(C)   Asexual reproduction takes place by motile aplanospores and non-motile zoospores
(D)   White spots seen on mustard leaves are due to parasitic fungus Albugo

Which one of the following statements is incorrect?

(A)   Mesoglea is present in between ectoderm and endoderm in Obelia
(B)   Radial symmetry is found is Asterias
(C)   Fasciola is a pseudocoelomate animal
(D)   Taenia is a triploblastic animal

True segmentation or metamerism means

(A)   Body is externally and internally divided into segments
(B)   Each segment of body have serial repetition of at least some organs
(C)   Both A and B
(D)   There is no repetition of any organ in successive segments

What is are the features(s) that distinguish a stem from a root?

(A)   The stem is ascending part of the axis bearing branches, leaves, flowers and fruits.
(B)   Stem develops from the plumule of the embryo while rooting from the radical.
(C)   The stem bears nodes and internodes which are absent in roots.
(D)   All of the above

Read the following statements and find out the incorrect statement.

(A)   Underground stem of potato, ginger and turmeric are modified to store food in them
(B)   In potato, colocasia and ginger the underground stem act as organs of perennation to tide over conditions unfavourable for growth
(C)   The region of stem where leaves are born are called nodes while internodes are portions between two nodes
(D)   In cucumber, axillary bud is modified and protect plants from browsers

In monocotyledonous seeds, the embryo is small and situated in a groove at one end of the endosperm. It consists of one large and

(A)   Bean-shaped cotyledon known as Sigillum
(B)   Kidney shaped cotyledon known as Scutellum
(C)   Shield shaped cotyledon known as scutellum
(D)   Shield shaped cotyledon known as Tigellum

Assertion:- In monocotyledonous seed, a single shield shaped cotyledon present called scutellum and a short axis with a plumule and radical.
Reason:- The plumule and radicle are enclosed in sheath which are called coleorhiza and coleoptile respectively.

(A)   If both assertion and reason are true and the reason is the correct explanation of the assertion.
(B)   If both assertion and reason are true but reason is not the correct explanation of the assertion.
(C)   If assertion is true but reason is false.
(D)   If both assertion and reason are false.

Vascular bundles of monocot stem are

(A)   Conjoint, collateral and open
(B)   Conjoint, collateral and closed
(C)   Conjoint, bi collateral and open  
(D)   Conjoint, concentric and closed

Read the following statements and find out the incorrect statement.

(A)   Long bones of the legs, serve weight-bearing functions
(B)   The intercellular material of cartilage is semi-fluid and pliable
(C)   The products of the exocrine glands are released through ducts or tubes
(D)   Blood is a fluid connective tissue