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Biology Questions Answers Set For SSC CGL Tier 1

Biology Questions Answers Set For SSC CGL Tier 1

Biology Questions Answers Set For SSC CGL Tier 1

Biology Questions Answers Set For SSC CGL Tier 1

Q1. Monocost plants are characterized by the presence of

(a) tap roots

(b) fibrous roots

(c) annulated roots

(d) stilt roots

Q2. Prop roots of Banyan tree are meant for

(a) respiration

(b) absorption of water in soil

(c) retention of water in soil

(d) providing support to big tree

Q3. Root is distinguishable from stem in

(a) having a root cap

(b) having a root hair

(c) absence of nodes and internodes

(d) all of these

Q4. Ginger is an underground stem. It is distinguished from root because

(a) it lacks chlorophyll

(b) it stores food

(c) it has nodes and internodes

(d) it has xylem and vessels

Q5. Rachis is present in

(a) pinnate compound leaf

(b) palmate compound leaf

(c) both correct

(d) both wrong

Q6. Parallel venation occurs in

(a) monocots

(b)dicots

(c) all angiosperms

(d) ferns

Q7. The most important function of inflorescence is to help in

(a) forming large number of fruits

(b) attracting insects for cross-pollination

(c) dispersal of seeds

(d) release of pollen grains

Q8. Thalamus is

(a) base of flowers

(b) base of ovary

(c) modification of pollen

(d) modification of petal

Q9. Floral formula represents

(a) position of a flowers

(b) symmetry of a flowers

(c) function of a flowers

(d) diagrammatic potation of floral characteristics

Q10. A plant with both male and female flowers borne over it is

(a) monoecious

(b) dioecious

(c) unisexual

(d) bisexual

Biology Questions Answers
Q11. A flower zygomorphic when

(a) any transverse section divides it into two equal halves

(b) only one transverse section divides it into two equal halves

(c) every vertical section passing through its center divides it  into two equal halves

(d) only one vertical section passing through its center divides it  into two equal halves

Q12. Which of the following is an endospermic seed?

(a) pea

(b) bean

(c) gram

(d) castor

Q13. Fruit of groundnut is

(a) legume

(b) caryopsis

(c) berry

(d) nut

Q14. Vivipary is characteristics of

(a) mesophytes

(b) xerophytes

(c) hygrophytes

(d) halophytes

Q15. Fruit of Mangifera indica is

(a) berry

(b) drupe

(c) capsule

(d) siliqua

Explanations: 

Ans 1. (b) Monocost plants are characterized by the presence of fibrous roots.

Ans 2. (d) Prop or Pillar or columnar roots: They are pillar like roots which give extra mechanical support to heavy stem branches. E.g., Banyan tree.

Ans 3.(d) Root is distinguishable from stem in having a root cap, having a root hair, absence of nodes and internodes

Biology Questions Answers
Ans 4.(c) Ginger is an underground stem. It is distinguished from root because it has nodes and internodes

Ans 5. (a) It is the most familiar and wide spread type of compound leaf in which the rachis is elongated and bears two rows of simple or divided leaflets. The leaflets arranged alternately or in pairs along with the rachis

Ans 6.(a) In parallel venation, veins and veinlets run parallel to each other. Parallel venation is characteristics features of monocots.

Ans 7.(b) the most important feature of inflorescence is it makes flower more cinsipicious to pollinating agents so that chances of cross pollination are high.

Ans 8.(a) The broadened base of flower which lies at the tip of pedicel is called torus or thalamus or receptacle.

Ans 9.(d) Floral formula is a symbiotic and numerical way to provide information about : number, position, adhesion and cohesion of floral parts, symmetry of the flower and sexuality of the flower.

Ans 10.(a) A plant bearing flower of both sexes, i.e., staminate and pistillate flowers, e.g., ricinus, zea mays and cucurbits.

Ans 11.(d) A flower zygomorphic when only one vertical section passing through its center divides it  into two equal halves.

Ans 12.(d) Castor is an endospermic. In albuminous seeds, embryo not consumed all endosperm. So, it persists in the mature seed. In this seeds food stored in endosperm.

Ans 13.(a) Legume is a dehiscent dry fruit produced from a monocarpellary superior ovary. Caryopsis is dry and one seeded fruit which developed from a superior monocarpellary ovary. In this the pericarp is closed and fused with seed coat. It is a characteristic of family Poaceae.

Ans 14.(d) Special type of seed germination is characteristic of halophytes growing in saline conditions is vivipary. The seed germination occurs inside the fruit while it is attached to the parent plant.

Ans 15.(b) Drupe is a fleshy one seeded, indehiscent fruit e.g., Mangifera indica.

 

 

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