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Biology Holiday Homework

This document contains practice questions from four chapters on reproduction for a Class XII biology assignment: 1) Chapter 1 questions cover external fertilization, gametogenesis, and asexual reproduction through diagrams. 2) Chapter 2 questions cover sexual reproduction in flowering plants including development of the embryo and endosperm. 3) Chapter 3 questions cover the human menstrual cycle, gametogenesis, and the roles of various reproductive organs and cells. 4) Chapter 4 questions cover birth control methods, intrauterine devices, medical termination of pregnancy, and assisted reproductive technologies.

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3K views2 pages

Biology Holiday Homework

This document contains practice questions from four chapters on reproduction for a Class XII biology assignment: 1) Chapter 1 questions cover external fertilization, gametogenesis, and asexual reproduction through diagrams. 2) Chapter 2 questions cover sexual reproduction in flowering plants including development of the embryo and endosperm. 3) Chapter 3 questions cover the human menstrual cycle, gametogenesis, and the roles of various reproductive organs and cells. 4) Chapter 4 questions cover birth control methods, intrauterine devices, medical termination of pregnancy, and assisted reproductive technologies.

Uploaded by

daisy p
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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BIOLOGY PRACTICE ASSIGNMENT CLASS XII – (2018-19)

CHAPTER 1: REPRODUCTION IN ORGANISMS

I) 3 MARKS QUESTIONS
1. Define external fertilization. Mention its disadvantages. What are
hermaphrodites?
2. Describe gametogenesis with suitable examples. What do you mean
by monoecious and dioecious organisms?
3. Diagrammatically depict asexual reproduction /vegetative
propagation in –a) Amoeba b) Chlamydomonas c)Bryophyllum

II) 5 MARKS QUESTIONS


1. a) Describe the terms: Ovipary, Vivipary and Ovo-vivipary (3)
b) State the post fertilization changes in flower (2)

CHAPTER 2: SEXUAL REPRODUCTION IN FLOWERING


PLANTS
II) 3 MARKS QUESTIONS

1. (a) Discuss the development of endosperm in coconut.


(b) What are tassels of corn cob?
(c) Mention one similarity between autogamy and geitonogamy.
2. What is apomixis? Explain any two ways by which apomictic seeds
develop.
3. What is agamopermy? How is it different from parthenocarpy and
parthenogenesis?
4. Draw a neat, labelled diagram of an anatropous ovule.

III) 5 MARKS QUESTIONS


5. (a) Explain the development of embryo in dicots.

(b) Why do most zygotes in angiosperms develop only after a certain

amount of endosperm is formed?

CHAPTER 3: HUMAN REPRODUCTION


I) 3 MARKS QUESTIONS
1. Describe how the changing levels of FSH, LH and progesterone during
menstrual cycle induce changes in the ovary and the uterus in human
females?
2. Write the specific location and function of the following cells in human
males
a. Leydig cells
b. Sertoli cells
c. Primary spermatocytes
3. Schematically represent the process of gametogenesis in females. What is
the significance of epididymis in male fertility?
II) 5 MARKS QUESTIONS
1. Explain the following:
a. Acrosomal reaction
b. Accessory glands in females
c. Sperm lysins
d. Decapacitation factors
e. Extra-embryonic membranes
CHAPTER 4: REPRODUCTIVE HEALTH

I) 3 MARKS QUESTIONS
1. A) How do oral pills help in birth control? Name the common pills
used (11/2)
B) Which of these has been produced by CDRI and how is it more
effective? (11/2)
2. Give a brief account of various intra-uterine devices. How do they
function? What are their advantages?
3. a. What are the various reasons that call for MTPs? (1)

b. What are the risk factors associated with MTP? (2)

II) 5 MARK QUESTIONS


1. Describe the various techniques employed under ART.

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