How do Organisms Reproduce Test

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How do Organisms Reproduce Test - 20

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Question 1
1 / -0

A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that:

A
They reproduce asexually

B
They are all prokaryotic

C
They reproduce only sexually

D
They are all multicellular
Solution
- Amoeba, Spirogyra, and Yeast all reproduce by the asexual method. Amoeba reproduces by binary fission, Spirogyra by fragmentation, and Yeast by the budding method.
- All are unicellular eukaryotic organisms.
So, the correct answer is options A.
Question 2
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The ability of a cell to divide into several cells during reproduction in Plasmodium is called:

A
Budding

B
Reduction division

C
Binary fission

D
Multiple fission

Solution

Plasmodium after feeding on red blood cells in humans undergoes asexual reproduction which is called schizogony or multiple fission. In multiple fission, Plasmodium divides into many cells.
So, the correct answer is 'Multiple fission'
Question 3
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The process of producing an organism of similar kind is called:

A
Digestion

B
Respiration

C
Reproduction

D
Excretion
Solution
- Reproduction can be defined as the biological process by which new individuals are produced from their parents.
- Since, the new individuals contain the genetic material obtained from their parents, therefore, they are similar to their parents.
Therefore, the correct option is C.
Question 4
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Fertilization occurs in the ............. tube.

A
Fallopian

B
Uterine

C
Intestinal

D
Vaginal

Solution

The fusion of male and female gamete is called fertilisation. In this process, the sperm travels from the uterus towards both fallopian tubes guided by the chemical release by female reproductive organs. The ovum matures and travels slowly from the oviducts in the fallopian tubes. Both the gametes unite in fallopian tubes giving rise to a diploid zygote. So, the correct answer is option A.
Question 5
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The given figure shows the stages of binary fission in Amoeba. Which one out of the following would you select as the correct sequence of these stages?

A
A, B, C, D

B
A, C, D, B

C
B, D, A, C

D
C, A, D, B

Solution

Binary fission is an asexual mode of reproduction in Amoeba. The parent cell is denoted by (B) which replicates the genetic material as observed in (D). After karyokinesis, the cytoplasm divides to get distributed in two cells (A). The two cells as shown in (C) are the daughter cells which are formed by the binary fission. They are identical to the parent cell and contains the same copy of the genetic material.
Thus, the correct answer is option C.
Question 6
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The given figure represents:

A
Budding in Hydra

B
Budding in Planaria

C
Regeneration in Planaria

D
Budding in Saccharomyces (yeast)
Solution
Correct Option: C
Explanation:
- The above figure is of planaria.
- It represents the regenerative type of asexual reproduction. It is also seen in lizards’ tails, metazoans, etc.
- In regeneration, each body part has the capability to give rise to the lost part.
- For example- the injured part or defective part of planaria will develop its rest body part with respect to the injured body part and form whole new individuals.
Hence, the figure represents the regeneration in planaria.
Question 7
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The given diagrams represent the reproductive systems in the human male and female. The blockages shown at A and B would most likely interfere with the ability to:

A
Transport gametes

B
Produce mature gametes

C
Eliminate waste products through the urethra

D
Express secondary sex characteristics
Solution
- A - represents vasa deferentia that transports sperm from the testes to the urethra.
- B - represents fallopian tubes or oviducts that play an important role in the transport and fertilization of the egg.
- So, blockage at the site (A) and (B) interferes with the transport of gametes and will prevent pregnancy.
- The surgical blocking of the vas deferens to prevent the passage of sperms is known as vasectomy.
- The surgical blocking of the oviduct is known as tubectomy.
So, the correct answer is option A.
Question 8
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In the figure of budding in yeast, structures a, b, c and d should be labelled respectively as:

A
Nucleus of bud, bud, yeast (parent cell), nucleus of yeast (parent cell)

B
Bud, yeast (parent cell), nucleus of yeast (parent cell), nucleus of bud

C
Nucleus of bud, bud, nucleus of yeast (parent cell), yeast (parent cell)

D
Nucleus of yeast (parent cell), yeast (parent cell), bud, nucleus of bud

Solution

Budding is the main method of reproduction in yeast. During favourable conditions, yeast reproduces by budding in which a small outgrowth called bud forms on the parent cell.
Label 'c' is the yeast (parent cell) and label 'b' is the bud
After this, the nucleus of the parent cell divides and migrates into the bud.
Label 'd' is the nucleus of the parent yeast and label 'a' is the nucleus of the bud. This bud increases in size and finally breaks off to form the new individual.
Thus, the correct answer is option A.
Question 9
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Vegetative propagation refers to formation of new plants from:

A
Stem, roots and leaves

B
Leaves, flowers and seeds

C
Stem, roots and seeds

D
Fruits, seeds and spores

Solution

Vegetative propagation refers to the asexual mode of reproduction in which the formation of new plants occurs from vegetative parts like stems, leaves, and roots of the plant. Hence, option A is the correct answer.
Question 10
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Power of regeneration is found in:

A
Planaria

B
Hydra

C
Both A and B

D
None of the above

Solution

Regeneration can be defined as the natural ability of some organisms to repair and regrow damaged or lost body parts. Some organisms may have the ability to grow into a complete organism even from a small fragment of the body, e.g. Hydra and Planaria. Hence, the correct option is C.