Transportation

 Biology XI Notes - Transportation - Short Questions Answers

Q.1: Write a note on Diffusion?

Ans: Diffusion:

  • The movement of ions or molecules from an area of higher concentration to an area of lower concentration.

Example:

  • Dropping crystals of KMnO₄ or copper sulfate in water causes them to dissolve and spread, coloring the water.

Gaseous Exchange

 Gaseous Exchange - Short Questions Answers Biology - XI

Chapter # 13 Short Questions Answers

Section IV - Functional Biology


BOTANY PART

Q.1: Describe Photorespiration in Plants?

Ans: Photorespiration in Plants:

  • When plants use oxygen and release CO₂ during day time, in the presence of sunlight, it is called photorespiration.
  • Photorespiration occurs in special plants during hot and dry days, such plants are called C₃ plants, for example wheat, rice, sugarcane.

Nutrition

 Chapter # 12

NUTRITION
BOTANY PART

Q.1: What is nutrition and what are different types of nutrition?

Ans:
The process by which living organisms obtain energy to perform all their functions of life to make important materials and to maintain their structure is called nutrition.

Types Of Nutrition:
There are two types of nutrition:

BIOENERGETICS

 BIOENERGETICS

Q.1: What is Photosynthesis?

Ans: Photosynthesis is a process in which plants manufacture their food in the presence of chlorophyll and sunlight by the combination of carbon dioxide and water to form simple carbohydrates. In this process, oxygen is liberated. It is important to note that the amount of carbon dioxide consumed in this process is equal to the amount of oxygen liberated.

In photosynthesis, not only simple carbohydrates are formed but also a considerable amount of energy, which is initially obtained from sunlight as radiant energy, is transferred by green cells into chemical energy.

KINGDOM ANIMALIA

 KINGDOM ANIMALIA

Q.1: What are the diploblastic and triploblastic?

Ans: DIPLOBLASTIC AND TRIPLOBLASTIC ORGANIZATION:
Diploblastic are the animals whose body wall is composed of two layers: outer ectoderm and inner endoderm. Between these two layers, a non-cellular gelatinous layer called mesogloea is present.

Fig. 10-1(A): Diploblastic Organization (Hydra - T.S.)

Triploblastic are the animals whose body wall consists of three layers: outer ectoderm, middle mesoderm, and inner endoderm.

Fig. 10-1(B): Triploblastic Organization

Q.2: Write a note on Symmetry?

Ans: Symmetry:
A balanced structure and composition of the body according to the size and shape is called symmetry. It provides the least possible resistance in the movement of the body. There are two types of symmetry:

The Kingdom Plantae

 Biology XI Notes

The Kingdom Plantae - Short Questions Answers

Chapter # 09
Short Questions Answers
Section III - Biodiversity


THE KINGDOM PLANTAE

Q.1: Write a note on classification of Plants?

Ans: Classification of Plants:
Kingdom plantae is classified into two divisions:

  • Division – Bryophyta (Non vascular plants)
  • Division – Tracheophyta (Vascular plants)

Division Bryophyta: (Non-Vascular Plants)
This division is divided into three classes:

  • Class – Hepaticae (Liverworts)
  • Class – Musci (Mosses)
  • Class – Anthocerotae (Hornworts)

Kingdom Fungi

 Biology XI Notes

Kingdom Fungi - Short Questions Answers

Chapter # 08
Short Questions Answers
Section III - Biodiversity

Kingdom Fungi

Q.1: Describe the structure of the body of Fungi?

Ans: Structure of the Body of Fungi:

  • The fungi have a very simple body. In the majority of fungi, the body consists of a network of branched thread-like structures, called the Hyphae. When the hyphae form a mass, it is known as mycelium.