Biology
(a) State whether the following statements are TRUE (T) or FALSE (F).
- Fertilisation occurs in vagina.
- Uterus is also known as birth canal.
- Nutrition and oxygen diffuse from the mother's blood into the foetus's blood through amnion.
(b) Rewrite any two of the wrong statements by correcting only one word either at the beginning or at the end of the sentence.
Reproductive System
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Answer
(a)
- False
- False
- False
(b)
- Corrected Sentence — Fertilization occurs in the fallopian tube.
- Corrected Sentence — Vagina is also known as the birth canal.
- Corrected Sentence — Nutrition and oxygen diffuse from the mother's blood into the foetus's blood through placenta.
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Related Questions
Given below are some groups of terms. In each group, one pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
(a) Sperm : Spermatogenesis : Ovum : ……………
(b) Female gonad : Ovaries :: Male gonad : ……………
(c) Follicle cells : Ova :: …………… : Sperms
(d) Leydig cells : Testosterone :: …………… : Oestrogen
(e) Follicular phase : 5-12 days :: Luteal phase : …………… days.
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
(a) Testis, Epididymis, Uterine tube, Sperm duct.
(b) Seminal vesicle, Seminiferous tubule, Prostate gland, Cowper’s gland.
(c) Uterus, Ureter, Oviduct, Ovaries.
(d) Choroid, Chorion, Amnion, Allantois.
(e) Zona pellucida, Acrosome, Axial filament, Middle piece.
Complete the following table by writing the name of the structure or the function of the given structure:
Structure Function (1) Corpus luteum 1. …………… (2)…………… 2. Produces male gametes in mass (3)Leydig cells 3. …………… (4)…………… 4. Stores the sperms until they mature and become mobile (5)Umbilical cord 5. …………… (6)Fallopian tube 6. …………… Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them.
(a) Foetus
- Where is it contained?
- How does it differ from embryo?
(b) Hyaluronidase
- Is it an enzyme or simply a protein?
- What is its function?
(c) Morula
- What is this stage?
- Name the stage which comes next to it.
(d) Amniotic fluid
- Where is it found?
- What are its functions?
(e) Placenta
- What are the two sources that form placenta?
- Name any two main substances which pass from foetus to mother through placenta.
- Name any two hormones it produces.
(f) Implantation
- The development stage that undergoes this process.
- The approximate time after fertilization, when it occurs.