Dropsy is a condition in fish caused by the collection of fluid inside the body cavity or tissues. It can be caused by bacterial infections, parasitic infections, or liver dysfunction. The fish with dropsy can be recognised by the following symptoms: Swollen, sponge-like belly. Protruding scales. Bulging eyes. Loss of colour or pale gills. Faeces pale and stringy. Fins clamped against the body. Loss of appetite. The infection causing dropsy is not easily cured. Some experts recommend that all affected fish be euthanised to prevent the spread of the infection to healthy fish

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 18

EASY

12th Tamil Nadu Board

IMPORTANT

Earn 100

Write the names of biodiversity hotspots.

Important Questions on Biodiversity and its Conservation

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 19

Bhaskerbhai is a farmer in a village in Gujarat. He grows cotton in his fields. He does not buy fertilizers made in factories. He put dry leaves, which are allowed to rot. This mix with the soil and makes the soil fertile.

What is similar between Jhoom farming and Bhaskerbhai’s way of farming?

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 20

What is interesting in Jhoom farming?

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 21

What is the difference between Jhoom farming and Bhaskarbhai’s way of farming?

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 22

Describe the process of formation of soil.

HARD

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 23

Mention any two negative effects of loss of biodiversity in the region where it occurs.

HARD

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 24

At Andaman, authorities do not allow tourists to collect shells from beaches. Why it must be so?

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Biodiversity and its Conservation>Exercise>Q 25

The scientists believe that evolution is gradual. But extinction, part of evolutionary story, are 'sudden' and 'abrupt' and also group-specific. Comment whether a natural disaster can be the cause for extinction of species.

MEDIUM

12th Tamil Nadu Board

IMPORTANT

Zoology Crash Course (Based on Revised Syllabus-2023)>Chapter 11 - Solved Zoology Paper-2>Exercise>Q 13

Which one of the following is not a major characteristic feature of biodiversity hot spots?