Question

d) The statements given below are incorrect. Rewrite the correct statement
by changing the underlined word/words of the statements.
(5)
i) Enterokinase converts inactive trypsinogen into peptides.
ii) Coconut fibers are the cell walls of their living cells.
iii) Non essential part of a flower is concerned with reproduction.
iv) Sclerenchyma is composed
elongated cells which are thick at the corners.
v) Pylorus sphincter prevents the backflow of food into the oesophagus.

Answer 1

Answer:

i) Enterokinase converts inactivepepsinogen into peptides. ii) Dead cells.       iii) Consequently, the calyx (sepals) and the corolla (petals) are sterile and are referred to as the non-essential or accessory parts of the flower because they do not directly participate in the process of sexual reproduction.

iv) There are two main types of sclerenchyma cells: fibers and sclereids. Fibers are very elongated cells that can be found in stems, roots, and vascular bundles in leaves.

v) The pyloric sphincter serves as a kind of gateway between the stomach and the small intestine. It allows the contents of the stomach to pass into the small intestine. It also prevents partially digested food and digestive juices from reentering the stomach.

 

Explanation:

Answer 2

i) Enterokinase converts inactive trypsinogen into active trypsin.
ii) Coconut fibers are the cell walls of their dead cells.
iii) Essential part of a flower is concerned with reproduction.
iv) Collenchyma is composed of elongated cells which are thick at the corners.
v) Pylorus sphincter prevents the backflow of food into the stomach.

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