Railway Science (Biology-Reproduction in Animals) (Part-III)

Total Questions: 50

1. During which of the following types of reproduction do the fully matured tiny individuals detach from the parent body and become new independent individuals? [RRB Group D 03/10/2018 (Afternoon)]

Correct Answer: (c) Budding
Solution:

Budding: an asexual reproduction method in which a new organism develops from a bud of an existing organism. Example - Jellyfish. Binary fission - Cell is split into two parts, and each part produces a complete organism identical to its parents. Example - Amoeba.
Multiple fission - The cell is split into two or more than two parts, and each part will result in the formation of a complete organism. Example - Plasmodium. Regeneration - Organism repairs or regenerates the missing part of the body. Example - Lizard tail.

2. The vagina goes to the _________ . [RRB Group D 03/10/2018 (Evening)]

Correct Answer: (d) cervix
Solution:

The female reproductive system consists of a pair of ovaries along with a pair of oviducts, uterus, cervix, vagina and the external genitalia located in the pelvic region. The vagina is a muscular, hollow tube that extends from the vaginal opening to the uterus. The vagina connects with the uterus, or womb, at the cervix .

3. In humans, females have a ________ set of sex chromosomes. [RRB Group D 03/10/2018 (Evening)]

Correct Answer: (b) XX
Solution:

The male has XY chromosomes. The human body has 46 chromosomes or 23 pairs of chromosomes, of which 44 are called autosomes and 2 are called sex chromosomes.

4. Which process of fusion of sperm and gamete results in the formation of a structure called zygote? [RRB Group D 04/10/2018 (Morning)]

Correct Answer: (b) fertilisation
Solution:

Fragmentation involves a parent organism breaking into fragments to create new organisms. Sexual reproduction entails the fusion of a female egg and a male sperm. Tissue culture refers to growing cells in an artificial medium.

5. How many chromosome pairs are present in human sperm? [RRB Group D 05/10/2018 (Morning)]

Correct Answer: (b) 23
Solution:

The 23 chromosome pairs in a sperm cell are made up of 22 pairs of autosomes and one pair of sex chromosomes. Animals and their chromosome number (in Pairs) - Rat (51), Dog (39), Deer (35), Horse (32), Cow (30), Goat (30), Elephant (28), Ant (1), Lion and Tiger (19).

6. Which type of animals are called Hatching animals ? [RRB Group D 05/10/2018 (Afternoon)]

Correct Answer: (c) Oviparous
Solution:

Oviparous animals reproduce by laying eggs. This group includes birds, most reptiles, most amphibians, fish, and the majority of arthropods.

7. Those creatures are called viviparous, which- [RRB Group D 08/10/2018 (Morning)]

Correct Answer: (d) give birth to children
Solution:

Animals such as human beings, cows and dogs which give birth to young ones are called viviparous animals. Animals such as hen, frog, lizard and butterfly which lay eggs are called oviparous animals.

8. What type of reproduction can bring more diversity? [RRB Group D 09/10/2018 (Afternoon)]

Correct Answer: (c) sexual
Solution:

Sexual reproduction involves the fusion of gametes (such as sperm and egg cells) from two different individuals to produce offspring. Offspring produced through sexual reproduction inherit a unique combination of genes from both parents, leading to greater genetic diversity within a population.

9. The common passage for sperm and urine in human males is ________ . [RRB Group D 09/10/2018 (Evening)]

Correct Answer: (d) Urethra
Solution:

Urethra originates from the urinary bladder and extends through the penis to its external opening called urethral meatus. The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens.

10. Which of the following exhibits multiple fission? [RRB Group D 11/10/2018 (Evening)]

Correct Answer: (c) Plasmodium
Solution:

Malaria is caused by infection with protozoan parasites belonging to the genus Plasmodium transmitted by female Anopheles species mosquitoes. There are different plasmodium varieties like P. vivax, P. malaria, and P. falciparum. Multiple fission - A form of asexual reproduction where a single parent organism divides into many daughter organisms simultaneously.