Frank Brothers Solutions for ICSE Class 10 Biology Chapter 11 Reproductive System

Solution 1:
Answer:
1. Testes
2. Ovary
3. Uterus
4. Oviduct
5. Fertilization
6. Parthenogenesis
7. Testes and ovaries
In simple words: These are the key parts and processes of the reproductive system that help create new life.

📝 Teacher's Note: Use diagrams to show these parts visually and connect them to their functions. Students often confuse oviduct with ovary, so emphasize the difference clearly.

🎯 Exam Tip: Remember that testes produce sperm, ovaries produce eggs, and fertilization happens when sperm meets egg in the oviduct.

Solution 2:
Answer:
1. penis
2. vagina
3. oviduct
4. female
5. oviduct
In simple words: These fill-in-the-blank answers identify key reproductive organs and their gender associations.

📝 Teacher's Note: Emphasize that the oviduct appears twice because it's where fertilization occurs and where the egg travels to the uterus.

🎯 Exam Tip: Remember that fertilization typically happens in the oviduct (fallopian tube), not in the uterus.

Solution 3:
Answer:
1. Ovary: To produce ova and three female sex hormones i.e oestrogen, progesterone and relaxin.
2. Fallopian tube: To transport eggs from ovary to uterus and it a site of fertilization.
3. Uterus: To protect and provide nutrients for the developing embryo.
4. Vagina: To receive the seminal fluid.
5. Testes: To produce sperms and male sex hormone i.e. testosterone.
6. Penis: deposition of semen into the female's vagina.
In simple words: Each reproductive organ has a specific job - making eggs/sperm, transporting them, or providing a safe place for baby development.

📝 Teacher's Note: Connect hormone functions to physical changes during puberty to make it more relatable. Use analogies like "the uterus is like a safe nursery for the growing baby."

🎯 Exam Tip: Always mention both the structural function and hormone production when describing ovaries and testes for complete marks.

Solution 4:
Answer:
1. Parthenogenesis: It is a type of asexual reproduction in which a female gamete or egg cell develops into an individual without fertilization.
2. Asexual reproduction: It is the type of reproduction in which the offspring are formed without the production of gametes.
3. Sexual reproduction: It is the type of reproduction in which the offspring are formed after the fusion of gametes.
4. Dioecious: It is the individual / organism having male and female reproductive organs in separate individuals.
5. Monoecious: It is the individual / organism having male and female reproductive organs in the same individual.
6. Clone: It is a group of genetically identical cells or organisms asexually descended from a common ancestor.
In simple words: These terms describe different ways living things can reproduce - either needing a partner (sexual) or not needing one (asexual).

📝 Teacher's Note: Use examples like lizards (parthenogenesis) and earthworms (monoecious) to make these concepts concrete. Students often mix up dioecious and monoecious.

🎯 Exam Tip: Remember "di" means two (separate sexes) and "mono" means one (same individual has both sexes).

Solution 5:
Answer:
1. Parturition: The expulsion of the foetus from the mother's body is called parturition.
2. Ovulation: The process of release of an egg from the ovary is called ovulation.
3. Spermatogenesis: The production and development of sperms is called spermatogenesis.
4. Gestation: The period in which an embryo develops in the uterus is called gestation.
5. Implantation: The attachment of developing zygote to the uterine wall is called implantation.
In simple words: These are the key stages in reproduction - from egg release to sperm making to baby development and birth.

📝 Teacher's Note: Create a timeline showing these processes in sequence to help students understand the reproductive cycle chronologically.

🎯 Exam Tip: Remember the sequence: Ovulation → Fertilization → Implantation → Gestation → Parturition.

Solution 7:
Answer:
1. Graafian follicle
2. Uterus
3. Ovulation is the process of releasing of egg from the ovary.
4. The hormones secreted by the ovary are: oestrogen and progesterone.
In simple words: The Graafian follicle releases eggs during ovulation, and the ovary makes hormones that control the female reproductive cycle.

📝 Teacher's Note: Explain that the Graafian follicle is like a protective bubble around the egg that bursts during ovulation.

🎯 Exam Tip: Always mention both oestrogen AND progesterone when asked about ovarian hormones.

Solution 8:
Answer:
1. Peritoneum
2. Ureter
3. Backbone
4. Rectum
5. Seminal vesicle
6. Glands
7. Anus
8. Vas deferens
9. Epididymis
10. Left testis
11. Scrotum
12. Penis
13. Urethra
14. Vascular erectile tissue
15. Bladder
16. Muscular wall of abdomen
The two functions of part 6 are:
• Prostate gland secretes an alkaline milky secretion into semen that aids in sperm motility.
• Cowper's gland also secretes a lubricant.
17. The three components of urine are urea, uric acid, amino acids, glucose, sodium, potassium, vitamins etc.
18. The main function of the part labelled 3 is backbone. Its function is to give support, movement and protection to the spinal cord.
In simple words: This labels all the parts of the male reproductive system and nearby organs, showing how everything is connected.

📝 Teacher's Note: Use a large diagram and have students trace the path of sperm from testis to penis to understand the male reproductive pathway.

🎯 Exam Tip: Remember that glands (prostate and Cowper's) help sperm survive by making the environment less acidic and providing lubrication.

Solution 9:
Answer:
(ii) If fertilization takes place then, the wall of uterus thickens and is supplied with blood capillaries.
If fertilization do not takes place then, the endometrium breaks down and causes the discharge of blood and mucus.
In simple words: The uterus prepares for pregnancy each month, and if no baby starts growing, the lining sheds as menstruation.

📝 Teacher's Note: Explain menstruation as a natural cleaning process, not something to be ashamed of. Use the analogy of preparing a room for a guest.

🎯 Exam Tip: Always explain both scenarios - what happens if fertilization occurs AND if it doesn't occur.

Solution 10:
Answer:
1. Graafian follicle
2. Seminal vesicles and prostate gland
3. Uterus
4. Parturition
5. Oviduct
In simple words: These identify key reproductive structures and the birth process.

📝 Teacher's Note: Connect these terms to their functions - follicle releases eggs, glands help sperm, uterus holds baby, parturition is birth.

🎯 Exam Tip: Remember that seminal vesicles and prostate gland work together to support sperm function.

Solution 11:
Answer:
1. Fallopian tube
2. Funnel like opening
3. Uterus
4. Sacrum
5. Rectum
6. Cervix
7. Anus
8. Vagina
9. Front of pelvis
10. Bladder
11. Muscular uterine wall
12. Muscular wall of abdomen
13. Peritoneum
14. Normally, after 28 days an ovary releases an egg.
15. During coitus, sperm are released in the vagina.
16. After ejaculation in vagina, sperms undergo fertilization where it fuses with an ovum of female to form zygote.
17. The function of sacrum is to protect the pelvic organs or reproductive organs of female.
18. The gestation period in human is 280 days.
In simple words: This labels the female reproductive system and explains the basic process from egg release to fertilization to pregnancy.

📝 Teacher's Note: Emphasize the 28-day cycle and 280-day pregnancy period as important numbers to remember. Show how all parts work together.

🎯 Exam Tip: Remember key numbers: 28 days for egg release cycle, 280 days for pregnancy duration.

Solution 12:
Answer:
1. False
2. False
3. True
4. False
5. True
In simple words: These true/false answers test knowledge of reproductive system facts.

📝 Teacher's Note: Have students explain WHY each false statement is wrong to ensure understanding, not just memorization.

🎯 Exam Tip: Read true/false questions carefully - look for absolute words like "always" or "never" which often make statements false.

Solution 13:
Answer:
False.
Pregnancy in women can be prevented by the method of tubectomy.
In simple words: The statement is false because tubectomy (blocking fallopian tubes) prevents pregnancy, not causes it.

📝 Teacher's Note: Discuss family planning methods appropriately for the age group, focusing on the science rather than personal choices.

🎯 Exam Tip: Tubectomy prevents eggs from reaching the uterus, so pregnancy cannot occur.

Solution 14:
Answer:
Amnion.
In simple words: The amnion is the protective sac around a developing baby filled with fluid.

📝 Teacher's Note: Explain that the amnion is like a water balloon that protects the baby from bumps and keeps it at the right temperature.

🎯 Exam Tip: Amnion is the innermost membrane surrounding the fetus, filled with amniotic fluid for protection.

Solution 15:
Answer:
1. Menarche
2. Ovulation
3. Menstruation
4. Fertilization
5. Implantation
In simple words: These terms describe the key events in a female's reproductive life from first period to pregnancy.

📝 Teacher's Note: Create a timeline showing these events to help students understand the sequence and relationships between them.

🎯 Exam Tip: Menarche is the first menstruation, while menstruation is the monthly cycle that continues throughout reproductive years.

Solution 16:
Answer:
1. (b) continuity of race
2. (b) asexual reproduction
3. (b) female gamete
4. (c) Parthenogenesis
5. (b) vagina
6. (c) castration
7. (b) oviduct
8. (c) puberty
9. (b) menarche
10. (c) 20-30C below the body temperature
11. (d) menarche
12. (b) 10 days
In simple words: These multiple choice answers cover various aspects of reproduction including body parts, processes, and timing.

📝 Teacher's Note: Review each answer with explanations, especially the temperature requirement for sperm production and the timing of various reproductive processes.

🎯 Exam Tip: Remember that sperm need cooler temperature than body temperature to develop properly, which is why testes are outside the body.