Free How Do Organisms Reproduce? 02 Practice Test - 10th Grade 

Question 1

Sexual mode of reproduction results in offsprings identical to the parents.

A.

True

B.

False

SOLUTION

Solution : B

Sexual mode of reproduction gives similar but not identical offsprings whereas asexual mode gives mostly identical offspring. Offsprings born by sexual reproduction are not identical because sexual reproduction introduces variation.

Question 2

Which of the following methods of reproduction are employed by Hydra?

A.

By producing gametes

B.

Budding

C.

Regeneration

D.

Fission

SOLUTION

Solution : A, B, and C

Hydra reproduces by forming small buds on its body which later develop into tiny individuals. When mature, these tiny individuals detach from the parent body and become new independent individuals. This method is called budding. Hydra also reproduces by fragmentation. Any small fragment of the body of hydra can grow into a full-grown individual. Both these are asexual methods of reproduction. The most common method is budding. Hydra also reproduces sexually by forming gametes in ovary and testes. 

                        

Question 3

The technique of sterilizing a male by blocking the vas deferens is known as:

A.

Tubectomy

B.

Vasectomy

C.

Hysterectomy

D.

Masectomy

SOLUTION

Solution : B

  ∙ Vasectomy is a surgical procedure for male sterilisation and/or permanent contraception. During the procedure, the male vas deferens are severed and then tied/sealed in a manner so as to prevent sperms from entering into the seminal stream (ejaculate) and thereby preventing fertilisation.
  ∙ Tubectomy is a similar process in females where the fallopian tube is sealed.
  ∙ Hysterectomy is the removal of uterus which is carried out only is severe disease conditions. 
  ∙ Mastectomy is the medical term for the surgical removal of one or both breasts, partially or completely.

Question 4

The disc-like tissue embedded in the uterine wall which provides nutrition to the embryo within the womb is known as the placenta.

A. True
B. False

SOLUTION

Solution : A

When the zygote gets attached to the wall of the uterus (implantation), a disc-like tissue is formed. This tissue provides all the nutrition and oxygen to the growing embryo and removes all the waste material as well.  This disc-like tissue, known as placenta, is also responsible for conferring immunity to the growing embryo.

Question 5

Identify A.

A.

Vas deferens

B.

Ovules

C.

Vagina

D.

Fallopian Tube

SOLUTION

Solution : D

Fallopian tube connects ovaries to the inner side of uterus. The main function of the fallopian tube is to transport the egg from the ovary to the uterus.

Question 6

Identify A.

A. Testis
B. Scrotum
C. Seminal vesicle
D. Vas deferens

SOLUTION

Solution : D

The vas deferens is a long, muscular tube that travels from the epididymis into the pelvic cavity, to just behind the bladder. The vas deferens transports mature sperm from the testis to the urethra which is the tube that carries urine or sperm to outside of the body.

Question 7

In a fertilised flower, _____ forms the fruit whereas _____ forms the seed.

A. ovary, ovule
B. ovule, pollen
C. ovule, ovary
D. pollen, ovary

SOLUTION

Solution : A

Flower is the reproductive part of a plant. The female parts of the flower will create an ovule (unfertilised egg). The egg will remain in the ovary and waits to be fertilised. The male parts (in particular, the anther) will produce pollen, which contains the sperm needed to fertilise the egg. After fertilisation, the ovary develops into a fruit whereas the ovules develop a hard coat and gradually gets converted into seeds.

Question 8

The pollen in a flower can be transferred through

A. Water
B. Air
C. Insects
D. By plants themselves

SOLUTION

Solution : A, B, C, and D

Pollens are yellow coloured powder-like grains produced by stamens and it contains the male germ cell of the flower. Pollen grains, from anthers, get transferred to the female part of the flower i.e stigma, the process is called as pollination. They germinate there and later fertilization takes place where male germ cells are fused with female germ cells and a zygote is formed. Pollination is of two types: self-pollination and cross-pollination. Pollinating agents are animals such as insects, birds, and bats; water; wind; and even plants themselves, when self-pollination occurs within a closed flower.

Question 9

In which of the following organisms does budding take place?

A.

Amoeba

B.

Hydra

C.

Lizard

D.

Spirogyra

SOLUTION

Solution : B

Hydra and yeast can reproduce by budding. Amoeba reproduces by fission. Lizard does not reproduce by asexual reproduction. Spirogyra reproduces by fragmentation.

Question 10

Which of the following does not use asexual mode of reproduction?

A.

Amoeba

B.

Planaria

C.

Bryophyllum

D.

Coconut tree

SOLUTION

Solution : D

Amoeba reproduces by fission. Planaria reproduces by fragmentation and bryophyllum reproduces by vegetative propagation. All these three are asexual modes of reproduction. In coconut trees, or any palm trees, pollen from male flowers transfers to female flowers, which develop a fruit with a seed inside. This is sexual reproduction, and it keeps the species genetically flexible.
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