Home
Class 14
BIOLOGY
External fertilisation occurs outside fe...

External fertilisation occurs outside female body. Given below are names of some animals.
Select those in which fertilisation is external
1. Fishes
2. Ostrich
3. Frogs
4. Platypus
5. Humans
The options are

A

1 and 2

B

1, 2 and 3

C

1 and 3

D

2, 4 and 5

Text Solution

AI Generated Solution

The correct Answer is:
To determine which animals from the provided list undergo external fertilization, we need to analyze each option: 1. **Fishes**: Most fish species reproduce through external fertilization. The male fish releases sperm into the water, where it fertilizes the eggs released by the female. Therefore, fishes are included. 2. **Ostrich**: Ostriches are birds that engage in internal fertilization. The male fertilizes the female's eggs inside her body before they are laid. Thus, ostriches do not undergo external fertilization. 3. **Frogs**: Frogs typically reproduce through external fertilization. The female frog lays eggs in water, and the male frog releases sperm over the eggs to fertilize them. Hence, frogs are included. 4. **Platypus**: The platypus is a unique mammal that lays eggs. However, it undergoes internal fertilization. Therefore, the platypus does not have external fertilization. 5. **Humans**: Humans reproduce through internal fertilization, where the male sperm fertilizes the female egg inside her body. Thus, humans do not undergo external fertilization. Based on this analysis, the animals that undergo external fertilization are: - **Fishes** - **Frogs** ### Final Answer: The animals with external fertilization are **Fishes and Frogs**.
Promotional Banner

Similar Questions

Explore conceptually related problems

Among the statements given below about Nereis , select the incorrect statements about the organism and mark the correct code . I . The phenomenon of sexual maturation of Nereis is called heterotoky . II . The pygidium or Nereis is called anal segment . III . The alimentary canal of the organism has three distinct regions . IV . Fertilisation is external and occur in sand . V . Mesenteron of Nereis has oesophagus , stomach and intestine .

Given below are a few statements related to external fertilisation. Choose the correct statements. (i) The male and female gametes are formed and released simultaneously. (ii) Only a few gametes are released into the medium. (iii) Water is the medium in a majority of organisms exhibiting external fertilisation. (iv) Offspring formed as a result of external fertilisation have better chance of survival than those formed inside an organism.

Select the difference which is wrongly written Cartilaginous fish -Bony fishes (1) Operculum is absent - Operculum is present (2) Fertilization is internal - Fertilization is external (3) Posses 5-7 pair of gills - Posses 4 pair of gills (4) Mostly oviparous - Mostly viviparous

Identify the following four animals (1, 2, 3 and 4) given below. Which one of these is not correctly identified in the option given along with its correct taxonomic group and their common name ? Options :-

A few statements with regard to sexul reproduction are given below : i. Sexual reproduced does not always require two indiviuals . ii. Sexual reproduction generally involves gametic fusion . iii. Meiosis never occurs during sexual reproduction . iv. External fertilisation is a rule during sexual reproduction . Choose the correct statements from the options gives below :