Level- 3 Test: Reproduction in Organisms - NEET MCQ

Individual germline cells are called germ cells. During the process of gametogenesis, a germ cell undergoes meiosis to produce haploid cells that directly develop into gametes. Hence, in animals, meiosis is an integral part of gametogenesis.

In Ginger the part that we eat is actually the root which is also called as Rhizome of the plant. A rhizome is a modified stem that grows horizontally underground.

Hydra freshwater polyps have a remarkable property to regenerate after bisection or even after dissociation. It has the ability to regrow the body parts, which have been damaged. Thus, the correct answer is option C.

In the viviparous type of animals, females can give birth to young ones. Mammals (except egg-laying mammals), like whale, shark, mouse, humans are examples of viviparous animals. Frog is an oviparous animal. The butterfly is an oviparous animal

So, the correct answer is Human being.

Rhizomes are simply fleshy underground stems. They grow underground or right at ground level with many growing points or eyes similar to potatoes. Common examples of rhizomes include canna lilies, bearded Iris, ginger, and bamboo.

Wheat, Triticum, has a basic chromosome number, n = 7; thus the hexaploid species (Triticum aestivum) have 6n = 42. Haploid chromosome number is the one present in gametes of that organism; gametes contain half the chromosomes of the somatic cells. Thus, the haploid chromosome number of hexaploid wheat is 21. Monoploidy is the presence of a single basic chromosome set; thus monoploid of hexaploid wheat has x = 7 chromosomes.

Self-fertilisation is the fertilisation of plants and some invertebrate animals by their own sperm rather than that of another individual. It occurs in bisexual animals as in flatworms and molluscs but though earthworm has both male and female sex organs, they cannot self-fertilize because sperms and ova mature at the different time. Thus, the correct answer is option c.

Sucker is an adaptation in which the stems arise from the underground, grow horizontally and promote asexual reproduction at a neighbouring site. At the new site, it will give rise to a new aerial shoot or crown.The process is repeated. Each sucker has one or More nodes with scale leaves and axillary buds, e.g., Chrysanthemum. 

Curcuma domestica and Zingiber officinale are the examples of rhizomes

Budding is the mode of asexual reproduction wherein an outgrowth of part of a cell/body develops into progeny and either get separated or remain attached to the parent to form a new colony. Options I shows single cells not budding. Option II shows bud formation and nuclear division. Options III and IV show the chain of cells produced by budding.

Self-fertilisation is the fertilisation of plants and some invertebrate animals by their own sperm rather than that of another individual. It occurs in bisexual animals as in flatworms and molluscs but though earthworm has both male and female sex organs, they cannot self-fertilize because sperms and ova mature at the different time. Thus, the correct answer is option C

A form of budding called suckering is the reproduction or regeneration of a plant by shoots that arise from an existing root system. Species that characteristically produce suckers include Elm (Ulmus), Dandelion (Taraxacum), and many members of the Rose family such as Rosa and Rubus.

Hydra freshwater polyps have a remarkable property to regenerate after bisection or even after dissociation. It has the ability to regrow the body parts, which have been damaged. Thus, the correct answer is option C.

• The organisms use different methods for reproduction. The reproduction process in Hydra is called as budding. 
• Budding is the asexual mode of reproduction. In budding, a genetically identical new organism grows attached to the body of parent Hydra and separates later on.
•  In the process of budding, a bud develops as an outgrowth due to repeated cell division at one specific site. There is no reproduction through multiple fission.

Bisexual nature is seen mostly in angiosperm plants but some animals own both the sex organs and also their gametes associate with both male and female sexes. Examples of such animals are the earthworm, tapeworm, sponge, leech, etc. So, the correct answer to the question is earthworm, sponge, and leech.

Sponges, coelenterates, flatworms, and aschelminthes. Some species of sponge are monoecious, others are dioecious. Sperm and eggs are formed by aggregations of cells called amoebocytes in the body wall; these are not considered gonads because of their origin and transitory nature.

In biology, meiosis is the process by which one diploid eukaryotic cell divides to generate four haploid cells often called gametes. Meiosis does not occur in archaea or bacteria, which reproduce via asexual processes such as mitosis or binary fission.

A diploid parent plant body produces haploid gametes and a haploid parent plant body produces haploid gametes.

The fern called Ophioglossum reticulatum has 1260 chromosomes. Animal chromosome numbers range from 254 in hermit crabs to 2 in a species of roundworm. Onion has 16, housefly has 12 & butterfly has 380 chromosomes.

A meiocyte is the type of cell in the organism which differentiates into a gamete through the process of meiosis. 

Generally, through meiosis, the diploid meiocyte divides into four genetically different haploid gametes. 

So, the meiocytes are diploid cells i.e., 2N = 20. 

Since a somatic cell is also a diploid cell. So, the somatic cell 2N = 20.

In case of Butterfly: 

Chromosome numbers in meiocytes (diploid, 2n)= 360 

Gametes (haploid, n) = 190