BIOLOGY M.C.Q (1 Marks)

$A$. Asexual reproduction occurs usually by biflagellate zoospores.

$B$. Sexual reproduction is by oogamous method only.

$C$. Stored food is in the form of carbohydrates which is either mannitol or laminarin.

$D$. The major pigments found are chlorophyll $a$, $c$ and carotenoids and xanthophyll.

$E$. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.

Choose the correct answer from the options given below:

Assertion $A:$ In gymnosperms the pollen grains are released from the microsporangium and carried by air currents.

Reason $R$ : Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed.

In the light of the above statements, choose the correct answer from the options given below :

Assertion $A$ : The first stage of gametophyte in the life cycle of moss is protonema stage.

Reason $R$: Protonema develops directly from spores produced in capsule.

In the light of the above statements, choose the most appropriate answer from options given below:

Choose the correct answer from the options given below :

Choose the correct answer from the options given below:

$A.$ Mosses and lichens are the first organisms to colonise a bare rock.

$B.$ Selaginella is a homosporous pteridophyte.

$C.$ Coralloid roots in Cycas have $VAM$.

$D.$ Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.

$E.$ In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

$(A)$ Inliverworts,mossesandferns gametophytes are free­living.

$(B)$ Gymnosperms and some ferns are heterosporous.

$(C)$ Sexual reproduction in Fucus, Volvox andAlbugo is oogamous.

$(D)$ The sporophyte in liverworts is more elaborate than that in mosses.

$(E)$ Both, Pinus and Marchantia are dioecious. How many of the above statements are correct?

 $\begin{array}{|l|l|} \hline Column\,\,-\,\,I & Column\,\,-\,\,II \\ \hline (1)\,\,Gymnosperm & (p)\,\,Sphegnum \\ \hline (2)\,\,Angiosperml & (q)\,\,Sellaginella \\ \hline (3)\,\,Bryophytes & (r)\,\,Pinus \\ \hline (4)\,\,Pteridophyte & (s)\,\,Eucalyptus \\ \hline \end{array}$

$I.$ double fertilisation $II.$ triploid endosperm $III.$ Diploid endosperm

Choose the correct option from the following regarding above statements

$I.$ In gymnosperms, the male and female gametophytes have an independent existence.

$II.$ The multicellular female gametophyte is retained within the megasporangium.

$III.$ The gymnosperms are heterosporous.

Of these statements

$R$- Conifers have needle like leaves.

$(a)$ Heterospory

$(b)$ Endosporic development of gametophyte

$(c)$ Reduced gametophyte

$(d)$ Localization of sporangium bearing appendages in strobili

$(e)$ Unisexual gametophytes

$(f)$ Fertilization with the help of water

$R$ - Cones are developed in selaginella and Equisetum.

$I.$ In Chlorophyceae, the stored food material is starch and the major pigments are chlorophyll-a and chlorophyll - d

$II$. In Phaeophyceae, laminarian is the stored food and major pigments are chlorophyll-a and chlorophyll b

$III$. In Rhodophyceae, floridean starch is the stored food and major pigments are chlorophylla-a,d and phycoerythrin.

 $\begin{array}{|l|l|} \hline Column-I & Column-II \\ \hline 1.\,\,Phaeophyceae & A.\,\,Chara \\ \hline 2.\,\,Chlorophyceae & B.\,\,Wolffia \\ \hline 3.\,\,Rhodophyceae & C.\,\,Porphyra \\ \hline 4.\,\,Angiosperms & D.\,\,Ectocarpus \\ \hline \end{array}$

Fill the blanks with respect to $A$ and $B$. choose the correct option

$(a)$ In equisetum the female gametophyte is retained on the parent sporophyte.

$(b)$ In Ginkgo male gametophyte is not independent.

$(c)$ The sporophyte in Riccia is more developed than that in Polytrichum.

$(d)$ Sexual reproduction in Volvox is isogamous.

$(e)$ The spores of slime molds lack cell walls.

How many of the above statement are correct?

$(1)$ In liverworts, mosses and ferns gametophytes are free-living

$(2)$ Gymnosperms and some ferns are heterosporous

$(3)$ Sexual reproduction in Fucus, Volvoxand albugo is oogamous

$(4)$ The sporophyte in liveworts is more elaborate than that in mosses

$(5)$ Both Pinus and Marchantia aredioecious

How many of the above statements are correct?

$(a)$ Mosses and Lichens are the firstorganisms to colonise a bare rock

$(b)$ Selaginella is a homosporous pteridophyte

$(c)$ Coralloid roots in Cycas have VA Micorrhizae

$(d)$ Main plant body in bryophytes isgametophytic, whereas in pteridophytes it is sporophytic

$(e)$ In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte

$B.$ 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.