IGCSE Biology Paper-3: Specimen Questions with Answers 322 - 325 of 358

Passage

Leaves are made of tissues.

Question 322 (3 of 6 Based on Passage)

Edit

Write in Brief

One Liner▾

Describe the functions performed by root hair cells?

Explanation

The main function of root hair is to find the gap between soil particles and facilitate the process of water absorption and nutrient minerals. Water and nutrients that have been absorbed are then taken to other parts of the plant roots. Acid is secreted by this root hair. Acid will help dissolve nutrient minerals in the form of ions so that nutrient minerals are more easily transported and transported within the roots.

Question 323 (4 of 6 Based on Passage)

Edit

Write in Brief

One Liner▾

The process by which gases travel through the stomata.

Explanation

Carbon dioxide enters through the cell by the process called diffusion.

Question 324 (5 of 6 Based on Passage)

Edit

Write in Brief

One Liner▾

Outline how water that has entered a root hair cell reaches the stomata.

Explanation

Tranpirational Force

Question 325 (6 of 6 Based on Passage)

Edit

Write in Short

Short Answer▾

Stalk of leaf is called as

Explanation

Petiole (Mesopodium)

A petiole or leaf stalk is a cylindrical or sub cylindrical structure of a leaf which joins the lamina to the base. It raises the lamina above the level of stem to provide it with sufficient light exposure. A leaf with a petiole is called petiolate and the one without it is called sessile.

Structure of a Leaf