11.

Which of the following statements about Pteridophytes is true?

• The homosporous forms are precursors to the seed habit

• Gametophyte is the dominant plant body

• First terrestrial plants to possess vascular tissues

• Equisetum is a member of pteropsida

• Equisetum is a member of pteropsida

The modified supporting roots called prop roots and stilt roots are seen respectively in

(i) Banyan and maize

(ii) Banyan and sugarcane

(iii) maize and banyan

(iv) Sugarcane and maize

• (i) only

• (ii) only

• (ii) only

• (i) and (ii) only

• (i) and (ii) only

Consider the following statements with respect to fungi

(a) They show a great diversity in morphology and habitat

(b) The white spots seen on mustard leaves are due to a saprophytic fungus

(c) They prefer to grow in cold and humid places

(d) The cell walls of fungi are composed of chitin and polysaccharides

Of the above statements-

• (a) and (b) are correct

• (a) and (d) are correct

• (a) and (c) are correct

• (b) and (d) are correct

• (b) and (d) are correct

Which one of the following is not a characteristic feature of Fabaceae?

• Fruit is a berry

• Sepals five, gamosepalous and imbricate aestivation

• Stamens ten

• Ovary superior, monocarpellary and unilocular with many ovules

• Ovary superior, monocarpellary and unilocular with many ovules

Which of these plants has pinnately compound leaf at a node?

• Alstonia

• Calotropis

• Guava

• Mustard

• Mustard

The mango fruit is a drupe type in which are mesocarp is

• Fibrous

• Stony hard

• Thin and fleshy

• Fleshy and edible

• Fleshy and edible

Which of the following meristems are lateral meristems ?

• Apical meristem, interfacsicular cambium and cork cambium

• Fascicular vascular cambium, interfacsicular cambium and cork cambium

• Apical mertistem, intercalary meristem and cork cambium

• Intercalary meristem, interfacsicular cambium and cork cambium

• Intercalary meristem, interfacsicular cambium and cork cambium

Pick out the correct statement

• Spring wood is otherwise called late wood

• Autumn wood is otherwise called early wood

• In old trees, the heart wood is involved in the conduction of water

• In old trees, the sap wood does not conduct water

• In old trees, the sap wood does not conduct water

Which among these statements about collenchymas is true?

• Collenchyma cells are usually dead without protoplasts

• The cells are long and narrow with thick lignified walls

• Collenchyma occurs in layers below the epidermis in dicotyledonous plants

• These cells are found in the pulp of fruits like guava, pear and sapota

• These cells are found in the pulp of fruits like guava, pear and sapota

Slime layer and capsule in bacteria are modifications of the

• Glycocalyx

• Cell wall

• Plasma membrane

• Pellicle

• Pellicle