Fill in the blanks.

1. A _______________ is formed as a result of fertilization.
2. The male gametes are called _____________________.
3. The sperms travel through the sperm duct or vas deferens to reach the _________________.
4. The __________________ are almond-sized oval glands situated in the pelvic or hip region.
5. The cervix is narrow and opens to the outside through a muscular tube called the ______________.

Tick the most appropriate answer.

1. External fertilization occurs mostly in
   1. human beings
   2. frogs
   3. snakes
   4. birds
2. Sperms are produced by
   1. urethra
   2. ureter
   3. testes
   4. ovaries
3. Testes are present in a sac called
   1. sternum
   2. scrotum
   3. sperm duct
   4. semen
4. The sperms reach the urethra by travelling through the
   1. scrotum
   2. testes
   3. sperm duct
   4. vagina
5. The release of an egg from an ovary is called
   1. fertilization
   2. menopause
   3. menstruation
   4. ovulation
6. In human females, fertilization of egg takes place in
   1. ovary
   2. uterus
   3. vagina
   4. fallopian tubes
7. From the third week of development till the end of the second month of pregnancy, the developing organism is called
   1. infant
   2. embryo
   3. foetus
   4. zygote
8. The female sex hormones secreted by the ovaries are
   1. progesterone and testosterone
   2. progesterone and oestrogen
   3. thyroxine and testosterone
   4. oestrogen and testosterone

Fill in the blanks.

1. When an ovum fuses with a sperm outside the body, it is called _________________ fertilization.
2. Testes produce male sex hormone called _________________.
3. Fertilization of ovum takes place in the _________________.
4. The females have 28 day-long reproductive cycle called ______________.
5. The embryo is attached to the uterus by a structure called ________________.

Write true or false. Correct the false statements.

1. Sexual reproduction involves the fusion of an egg and a spore.
2. The ovum is carried from the ovary to the uterus by the vas deferens.
3. Oestrogen is a female sex hormone.
4. Normally, two eggs are released from one of the ovaries every month.
5. The formation of an individual from the zygote is called development.

Match the following.