(i) The hens give birth to chicks like human beings give birth to babies. Explanation: Aquatic animals lay eggs and release sperms into water for fertilization to take place. (e) External fertilization takes place in the frog. Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body. In this type, a zygote is formed within the mother and gets its nourishment from her. 9. MEDIUM. Is Snake fertilization internal or external? It is called internal fertilization because the process of reproduction i.e. Internal fertilization enhances the fertilization of eggs by a specific male. It occurs inside the body of the female. During internal fertilization, the sperm fertilizes the egg cell inside the female’s body. This can occur either inside (internal fertilization) or outside (external fertilization) the body of the female. The sperm packet is moved from the rooster to the hen. What's more, hens lay a lot . These two evolutionary advances required the previous development of internal fertilization. Both processes involve fusing male gametes with female gametes. Internal. Humans reproduce using internal fertilization, also known as sex. aryan9467 aryan9467 Answer: Fertilisation in hen takes place in inside the body of female hen.. whereas in frog fertilisation takes place outside the frog body. Internal Fertilization (In Vivo) In this type of fertilization, the fusion of sperm with egg occurs within the body of a female. The male gametes are deposited in the body of the female with the help of copulatory organ. So, the correct answer is option B. Humans provide an example of the former whereas seahorse reproduction is an example of the latter. Reptile - Reptile - Courtship and fertilization: The evolution of amniotic development and the shelled egg enabled vertebrates to become fully terrestrial. Fertilization has been classified into two: External fertilization and internal fertilization. B. And in this type of fertilization development of zygote takes place inside the mother’s body only and they get all kinds of nourishment from her. The egg white gathers around the yolk in the magnum. Fertilization • Fertilization is the union of egg and sperm – Egg (n) + Sperm (n) = zygote 2n. The dissimilarity is that in internal fertilization, the fusion occurs inside the body of the organism while in external fertilization, the fusion occurs outside the body of the organism. (f) An embryo is made up of a single cell. Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. External Fertilization. fertilization in frog is external while in the case of hen it is internal. Fertilisation in frog is - Outer intercourse or fertilisation and outer development. Fertilization which takes place inside the female body is called internal fertilization. takes place inside the female body. In most of the animals like human beings, cats, lions, pigs, dogs, hens, etc internal fertilization takes place. Typically, frogs lay eggs. Internal fertilization occurs in many animals including humans, cows, dogs and hens. They mate simply by pressing their cloacas together in what is known as a 'cloacal kiss' - the cloaca is the single opening birds use to excrete, mate and lay eggs, in case you didn't know. Site of Reproduction. What is Internal Fertilization. External fertilization is a method of fertilization in which a sperm cell fused with an egg cell in the open, rather than inside the specialized organs within the bodies of the parents. External Fertilization. Answer. The embryo is isolated within the female, which limits predation on the young. It is the vital and primary stage of sexual reproduction. takes about 26 hours for a hen to make an egg, and she can start . External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. ... Fertilization is internal. The process in which there is a fusion of sperm with the egg also known as the Ovum to produce Zygote is called Fertilization. Internal fertilisation take place in hen also. The size of the eggs is also characteristic of the animal. Similarities Between Internal And External Fertilization . In many animals fertilization takes place outside the body of the female. Intromittent organ: the external organ of a male that is used to deliver sperm for internal fertilization. This is seen in most terrestrial animals as well as some aquatic animals. 1)After fertilisation takes place inside the body of the hen, the fertilised egg or zygote divides repeatedly to form embryo which travel down the oviduct. Internal. Contrary to popular misconception, there is a major difference between internal and external fertilization. The chicken’s reproductive system is essentially divided into two parts: the ovary (responsible for producing the egg yolks) and the oviduct (where the egg white, membranes and shell develop around the yolk). In these animals, fertilization takes place in water. Abstract. Click to see full answer. Species in the mollusca phylum reproduce either through external or internal fertilization.Internal fertilization occurs when the species functions as both sexes and is thus a hermaphrodite. 2. 4) Very productive Chickens are egg-laying machines. Soln: Answer is (b) oviparous with external fertilisation. (c) viviparous with internal fertilisation. Internal vs External Fertilization & Development. days in their chicken coops all year around. Key Terms: Egg cell, External Fertilization, Internal Fertilization, Oviparity, Spawning, Sperms, Viviparity, Zygote. 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