Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 10th
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Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide chapter 16 - Plant and Animal Hormones [Latest edition]

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Class 10th SSLC Science Answers Guide - Shaalaa.com
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Chapter 16: Plant and Animal Hormones

Evaluation
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Evaluation [Page 239]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 239]

Choose the correct answer

Evaluation | Q I. 1. | Page 239

Gibberellins cause: ______

  • Shortening of genetically tall plants

  • Elongation of dwarf plants

  • Promotion of rooting

  • Yellowing of young leaves

Evaluation | Q I. 2. | Page 239

The hormone which has a positive effect on apical dominance is: ______

  • Cytokinin

  • Auxin

  • Gibberellin

  • Ethylene

Evaluation | Q I. 3. | Page 239

Which one of the following hormones is naturally not found in plants: ______

  • 2, 4-D

  • GA3

  • Gibberellin

  • IAA

Evaluation | Q I. 4. | Page 239

Avena coleoptile test was conducted by ______

  • Darwin

  • N. Smit

  • Paal

  • F.W. Went

Evaluation | Q I. 5. | Page 239

To increase the sugar production in sugarcanes they are sprayed with ______

  • Auxin

  • Cytokinin

  • Gibberellins

  • Ethylene

Evaluation | Q I. 6. | Page 239

LH is secreted by ______

  • Adrenal gland

  • Thyroid gland

  • Anterior pituitary

  • Hypothalamus

Evaluation | Q I. 7. | Page 239

Identify the exocrine gland.

  • Pituitary gland

  • Adrenal gland

  • Salivary gland

  • Thyroid gland

Evaluation | Q I. 8. | Page 239

Which organ acts as both an exocrine gland as well as an endocrine gland.

  • Pancreas

  • Kidney

  • Liver

  • Lungs

Evaluation | Q I. 9. | Page 239

Which one is referred to as “Master Gland”?

  • Pineal gland

  • Pituitary gland

  • Thyroid gland

  • Adrenal gland

Evaluation [Page 239]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 239]

Fill in the blanks

Evaluation | Q II. 1. | Page 239

______ causes cell elongation, apical dominance and prevents abscission.

Evaluation | Q II. 2. | Page 239

______ is a gaseous hormone involved in the abscission of organs and acceleration of fruit ripening.

Evaluation | Q II. 3. | Page 239

______ causes stomatal closure.

Evaluation | Q II. 4. | Page 239

Gibberellins induce stem elongation in ______ plants.

Evaluation | Q II. 5. | Page 239

The hormone which has a negative effect on apical dominance is ______.

Evaluation | Q II. 6. | Page 239

Calcium metabolism of the body is controlled by ______.

Evaluation | Q II. 7. | Page 239

In the islets of Langerhans, beta cells secrete ______.

Evaluation | Q II. 8. | Page 239

The growth and functions of the thyroid gland are controlled by ______.

Evaluation | Q II. 9. | Page 239

Decreased secretion of thyroid hormones in children leads to ______.

Evaluation [Page 240]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 240]

Evaluation | Q III a) | Page 240

Match Column I with Columns II and III.

Column I Column II Column III
Auxin Gibberella fujikuroi Abscission
Ethylene Coconut milk Intermodal elongation
Abscisic acid Coleoptile tip Apical dominance
Cytokinin Chloroplast Ripening
Gibberellins Fruits Cell division
Evaluation | Q III b) | Page 240

Match the following hormones with their deficiency states.

Hormones - Disorders
a) Thyroxine - Acromegaly
b) Insulin - Tetany
c) Parathormone - Simple goitre
d) Growth hormone - Diabetes insipidus
e) ADH - Diabetes mellitus
Evaluation [Page 240]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 240]

State whether True or false, If false write the correct statement

Evaluation | Q IV. 1. | Page 240

A plant hormone concerned with the stimulation of cell division and promotion of nutrient mobilization is cytokinin.

  • True

  • False

Evaluation | Q IV. 2. | Page 240

Gibberellins cause parthenocarpy in tomatoes.

  • True

  • False

Evaluation | Q IV. 3. | Page 240

Ethylene retards the senescence of leaves, flowers, and fruits.

  • True

  • False

Evaluation | Q IV. 4. | Page 240

Exophthalmic goiter is due to the over secretion of thyroxine.

  • True

  • False

Evaluation | Q IV. 5. | Page 240

The pituitary gland is divided into four lobes.

  • True

  • False

Evaluation | Q IV. 6. | Page 240

Estrogen is secreted by the corpus luteum.

  • True

  • False

Evaluation [Page 240]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 240]

Assertion and Reasoning

Evaluation | Q V. 1. | Page 240

Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.

  • Assertion: The application of cytokinin to marketed vegetables can keep them fresh for several days.
  • Reason: Cytokinins delay the senescence of leaves and other organs by mobilization of nutrients.
  • If both A and R are true and R is the correct explanation of A.

  • If both A and R are true but R is not the correct explanation of A.

  • A is true but R is false.

  • Both A and R are false.

Evaluation | Q V. 2. | Page 240

Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.

  • Assertion (A): The pituitary gland is referred to as the “Master gland”.
  • Reason (R): It controls the functioning of other endocrine glands.
  • If both A and R are true and R is the correct explanation of A.

  • If both A and R are true but R is not the correct explanation of A.

  • A is true but R is false.

  • Both A and R are false.

Evaluation | Q V. 3. | Page 240

Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.

  • Assertion (A): Diabetes mellitus increases blood sugar levels.
  • Reason (R): Insulin decreases blood sugar levels.
  • If both A and R are true and R is the correct explanation of A.

  • If both A and R are true but R is not the correct explanation of A.

  • A is true but R is false.

  • Both A and R are false.

Evaluation [Page 240]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 240]

Answer in a word or sentence

Evaluation | Q VI. 1. | Page 240

Which hormone promotes the production of male flowers in Cucurbits?

Evaluation | Q VI. 2. | Page 240

Write the name of synthetic auxin.

Evaluation | Q VI. 3. | Page 240

Which hormone induces parthenocarpy in tomatoes?

Evaluation | Q VI. 4. | Page 240

What is the hormone responsible for the secretion of milk in females after childbirth?

Evaluation | Q VI. 5. | Page 240

Name the hormones which regulate water and mineral metabolism in man.

Evaluation | Q VI. 6. | Page 240

Which hormone is secreted during an emergency situation in a man?

Evaluation | Q VI. 7. | Page 240

Which gland secretes digestive enzymes and hormones?

Evaluation | Q VI. 8. | Page 240

Name the endocrine glands associated with kidneys.

Evaluation [Pages 240 - 241]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Pages 240 - 241]

Short answer questions

Evaluation | Q VII. 1. | Page 240

What are synthetic auxins? Give examples.

Evaluation | Q VII. 2. | Page 240

What is bolting? How can it be induced artificially?

Evaluation | Q VII. 3. | Page 241

Bring out any two physiological activities of abscisic acid?

Evaluation | Q VII. 4. | Page 241

What will you do to prevent leaf fall and fruit drop in plants? Support your answer with reason.

Evaluation | Q VII. 5. | Page 241

What are chemical messengers?

Evaluation | Q VII. 6. | Page 241

Write the differences between the endocrine and exocrine glands. 

Evaluation | Q VII. 7. | Page 241

What is the role of parathormone?

Evaluation | Q VII. 8. | Page 241

What are the hormones secreted by the posterior lobe of the pituitary gland? Mention the tissues on which they exert their effect.

Evaluation | Q VII. 9. | Page 241

Why are thyroid hormones referred to as personality hormones?

Evaluation | Q VII. 10. | Page 241

Which hormone requires iodine for its formation?

Evaluation | Q VII. 10. | Page 241

What will happen if the intake of iodine in our diet is low?

Evaluation [Page 241]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 241]

Evaluation | Q VIII. 1. (a) | Page 241

Name the gaseous plant hormone. Describe its three different actions in plants.

Evaluation | Q VIII. 1. (b) | Page 241

Which hormone is known as a stress hormone in plants? Why?

Evaluation | Q VIII. 2. | Page 241

Describe an experiment that demonstrates that growth-stimulating hormone is produced at the tip of the coleoptile.

Evaluation | Q VIII. 3. | Page 241

Write the physiological effects of gibberellins.

Evaluation | Q VIII. 4. | Page 241

Where are estrogens produced?

Evaluation | Q VIII. 4. | Page 241

What is the role of estrogens in the human body?

Evaluation | Q VIII. 5. | Page 241

What are the conditions which occur due to lack of ADH and insulin? How are the conditions different from one another?

Evaluation [Page 241]

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide Chapter 16 Plant and Animal HormonesEvaluation [Page 241]

Evaluation | Q IX. 1. a. | Page 241

What would be expected to happen if Gibberellin is applied to rice seedlings?

Evaluation | Q IX. 1. b. | Page 241

What would be expected to happen if A rotten fruit gets mixed with unripe fruits?

Evaluation | Q IX. 1. c. | Page 241

What would be expected to happen if When cytokinin is not added to the culture medium.

Evaluation | Q IX. 2. a. | Page 241

A plant hormone was first discovered in Japan when rice plants were suffering from Bakanae disease caused by Gibberella fujikoroi. Based on this information answer the following question:

Identify the hormone involved in this process.

Evaluation | Q IX. 2. b. | Page 241

A plant hormone was first discovered in Japan when rice plants were suffering from Bakanae disease caused by Gibberella fujikoroi. Based on this information answer the following question:

Which property of this hormone causes the disease?

Evaluation | Q IX. 2. c. | Page 241

A plant hormone was first discovered in Japan when rice plants were suffering from Bakanae disease caused by Gibberella fujikoroi. Based on this information answer the following question:

Give two functions of this hormone.

Evaluation | Q IX. 3. | Page 241

Senthil has high blood pressure, protruded eyeball, and an increased body temperature. Name the endocrine gland involved and the hormone secretion responsible for this condition.

Evaluation | Q IX. 4. | Page 241

Sanjay is sitting in the exam hall. Before the start of the exam, he sweats a lot, with an increased rate of heartbeat. Why does this condition occur?

Evaluation | Q IX. 5. | Page 241

Susan’s father feels very tired and frequently urinates. After clinical diagnosis, he was advised to take an injection daily to maintain his blood glucose level. What would be the possible cause for this? Suggest preventive measures.

Chapter 16: Plant and Animal Hormones

Evaluation
Class 10th SSLC Science Answers Guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide chapter 16 - Plant and Animal Hormones

Tamil Nadu Board Samacheer Kalvi solutions for Class 10th SSLC Science Answers Guide chapter 16 (Plant and Animal Hormones) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 10th SSLC Science Answers Guide solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 10th SSLC Science Answers Guide chapter 16 Plant and Animal Hormones are Hormones, Plant Hormones, Types of Plant Hormones: Abscisic Acid (ABA), Pituitary Gland or Hypophysis Gland, Types of Plant Hormones: Auxins, Types of Plant Hormones: Gibberellins, Types of Plant Hormones: Cytokinins, Types of Plant Hormones: Ethylene, Thyroid Gland, Human Endocrine System, Hormones in Animals, Parathyroid Gland, Pancreas (Islets of Langerhans), Adrenal Gland (Suprarenal Gland), Reproductive Glands (Gonads), Thymus Gland.

Using Tamil Nadu Board Samacheer Kalvi Class 10th solutions Plant and Animal Hormones exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 10th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 16 Plant and Animal Hormones Class 10th extra questions for Class 10th SSLC Science Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation

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