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Find out what do the terms algal bloom and red-tides signify.
Biology
Biology

Class 11

NCERT

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: The Living World

11 questions

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2

Chapter 2: Biological Classification

12 questions

Q1
What is the nature of cell walls in diatoms?
Q2
Find out what do the terms algal bloom and red-tides signify.
Q3
How are viroids different from viruses?
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3

Chapter 3: Plant Kingdom

12 questions

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4

Chapter 4: Animal Kingdom

15 questions

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5

Chapter 5: Morphology of Flowering Plants

15 questions

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6

Chapter 6: Anatomy of Flowering Plants

12 questions

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7

Chapter 7: Structural Organization in Animals

14 questions

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8

Chapter 8: Cell: The Unit of Life

14 questions

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9

Chapter 9: Biomolecules

15 questions

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10

Chapter 10: Cell Cycle and Cell Division

16 questions

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11

Chapter 11: Transport in Plants

16 questions

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12

Chapter 12: Mineral Nutrition

10 questions

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13

Chapter 13: Photosysnthesis in Higher Plants

9 questions

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14

Chapter 14: Respiration in Plants

12 questions

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15

Chapter 15: Plant Growth and Development

11 questions

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16

Chapter 16: Digestion and Absorption

15 questions

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17

Chapter 17: Breathing and Exchange of Gases

14 questions

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18

Chapter 18: Body Fluids and Circulation

14 questions

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19

Chapter 19: Excretory Products and their Elimination

12 questions

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20

Chapter 20: Locomotion and Movement

10 questions

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21

Chapter 21: Neural Control and Coordination

12 questions

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22

Chapter 22: Chemical Coordination and Integration

9 questions

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Question
Easy
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Solving time: 2 mins

Find out what do the terms algal bloom and red-tides signify.

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Updated on: Jul 12, 2023

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Biology (NCERT)

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Algal bloom refers to the vigorous growth of algae or blue-green algae in the water, due to the enrichment of water body with mineral nutrients coming from fields, resulting in discoloration of the water body. This causes an increase in the biological oxygen demand (BOD), resulting in the death of fishes and other aquatic animals, due to suffocation.
Red-tide is a phenomenon caused by algal blooms during which algae become so numerous that they discolour coastal waters (hence, the name "red tide"). 
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Question 2
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Question 3
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Assertion: Actinomycetes are mycelial bacteria.
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Question 4
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c) Describe the process of nodule formation in leguminous plants. মাহজাতীয় উদ্ভিদত অর্বুদগঠন প্রক্রিয়াব বর্ণনা দিয়া। d) Define Hormone? Mention about different plant hormones. Describe briefly about the functions of Auxin. হবম'নব সংজ্ঞা দিয়া। বিভিন্ন প্রকাবব উদ্ভিদ হবম'ণব বিষয়ে উল্পখ কবা। अক্সিনব বিভিন কার্যব বর্ণনা দিয়া।
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Question 4
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Question Text
Find out what do the terms algal bloom and red-tides signify.
Updated OnJul 12, 2023
TopicBiological Classification
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 3
Upvotes433
Avg. Video Duration2 min