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

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 of the statements given below is not true about formation of Annual Rings in trees?

• Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.

• Activity of cambium depends upon variation in climate.

• Annual rings are not prominent in trees of temperate region.

• Annual ring is a combination of spring wood and autumn wood produced in a year

Xylem translocates

• Water and mineral salts only

• Water, mineral salts and some organic nitrogen only

• Water, mineral salts, some organic nitrogen and hormones

• Water only