Blue whales reproduce via sexual meiosis. The male and female each produce haploid gametes. Male gametes are sperm, and the female gametes are eggs. … They fertilize internally, meaning sperm is deposited inside the female.
What is an example of an oviparous?
Examples of oviparous animals include frogs, snakes, lizards, hens, duck, fishes, shark, penguins, butterflies, octopus, etc. Examples of viviparous animals include humans, bears, giraffes, cattle, some sharks, salamanders, some frogs, etc.
Which animals are oviparous have?
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and monotremes.
What is viviparous animals name?
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.
What are oviparous animals answer?
Oviparous animals are those who are born from eggs, outside the body of the parent. Answer: Oviparous animals are egg laying animals. They reproduce through the maturation of egg.
Are fish oviparous or viviparous?
Birds, reptiles, amphibians, most fish, insects, mollusks, arachnids, and monotremes are oviparous animals. Most mammals are viviparous animals.
Are Dolphins oviparous?
Dolphins are mammals, not fish
Like every mammal, dolphins are warm blooded. … Other characteristics of dolphins that make them mammals rather than fish are that they give birth to live young rather than laying eggs and they feed their young with milk.
How do humans mate?
Humans mate through a process called sexual intercourse. Human reproduction depends on the fertilization of a woman’s ova (egg) by a man’s sperm.
Do male whales get pregnant?
Whales are polygamous mammals, with females giving birth to live young and nursing them for several months. During breeding season, the male, or bull whale, copulates underwater with the female, or cow, in a complex mating ritual that varies widely from species to species.
Do whales have periods?
Females come into estrus several times during the year. Observations of females in zoological parks indicate that killer whales undergo periods of multiple estrous cycling (polyestrus), interspersed with periods of noncycling. On average, females may have four estrous cycles during one polyestrus period.
Are all whales viviparous?
Whales are mammals and are nourished in the womb through an umbilical cord. Whales even have a belly button after birth (this is the place where the umbilical cord was attached to). Whales are viviparous, they give birth to live young (unlike fish, most of which lay eggs).
Are all viviparous animals mammals?
All mammals except the platypus and the echidnas are viviparous. Only these two unusual mammals, called montremes, lay eggs. Some snakes, such as the Garter snake, are viviparous. … Although certain snakes give birth to live young, they are not viviparous.
Are sharks oviparous or viviparous?
Do sharks lay eggs or give live birth? Sharks exhibit a great diversity in reproductive modes. There are oviparous (egg-laying) species and viviparous (live-bearing) species.
Which fishes are viviparous?
fish that give birth to more or less completely formed young fry, as distinguished from fish that spawn eggs. Most selachii (the majority of sharks, stingrays, eagle rays, and giant rays) are viviparous fish.
Are birds oviparous?
Birds constitute the only vertebrate class that is both rich in species number and exclusively oviparous.
Are marine amphibians oviparous?
Currently, of the approximately 12,000 extant reptile species and sub-species, only about 100 of are classed as marine reptiles. Except for some sea snakes, most extant marine reptiles are oviparous and need to return to land to lay their eggs.
Are Dolphins viviparous or oviparous?
Platypus is a primitive semi-aquatic egg-laying mammal whereas dolphins and whales are viviparous aquatic mammals.
Are marsupials viviparous or oviparous?
Marsupial mammals are viviparous mammals in which the embryo is born at a very early stage and completes its development outside the mother’s body. Marsupials belong to the infraclass of therian mammals called Metatheria, which includes both living and extinct mammals.
Is krait viviparous?
Cobra, krait, and rat snakes are oviparous snakes. … Only two varieties of snakes that are boas and pythons, give birth to live ones, others lay eggs in a simple nest.
What are viviparous animals short answer?
Viviparous animals are those in which fertilization and embryo development occur inside the individual. Humans are viviparous. Mammals such as cows, monkeys, chimpanzees are viviparous.
What are viviparous animals Class 12?
– Certain animals undergo embryonic development inside a mother’s womb. They are known as viviparous animals. They do not lay eggs rather they give birth to live young individuals. – The eggs of a viviparous female lack a protective outer covering.
Which of the following is not a viviparous animal?
So, the correct answer is, ‘Platypus. ‘