How do sharks breed?
Sharks are very typical marine animals, and sharks have a very high status in the endless ocean. So do you know how sharks breed? Let's have a look together!
How do sharks breed
Sharks reproduce mainly through sexual reproduction. It is carried out in the form of oviparity, oviparity and pseudoviviparity. Sharks are fertilized in vivo, and all males have flippers.
II. Introduction of shark reproduction
1. Ootype
The egg shell is peculiar, and the size and shape vary with different species. The largest 30cm, wide 14cm and high 9cm are the largest eggs of living fish, while the smallest egg length 63mm and wide 37mm. Most kinds of egg shells are rectangular, with extended tendrils in four corners, which are used to wrap around seaweed, stones and other objects for hatching.
2. Oocyte birth
Most shark fertilized eggs develop into fetuses in the mother's womb and eventually give birth to larvae. The number of fetuses produced varies from dozens more to 2-3 less.
3. Fetal type
The fetus is closely related to the mother. the maternal uterine wall and the fetal yolk sac form the yolk sac placenta, and the maternal nutrients and oxygen enter the human fetus through the yolk sac placenta.
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How does Monopterus Albus reproduce?
Ricefield eel, also known as eel, has only a trigonous thorn on its whole body, which is less prickly and fleshy. The meat is tender and delicious. Do you know how Monopterus Albus breeds? How does Monopterus Albus breed? Monopterus Albus is propagated by fertilization, and the reproductive season of Monopterus Albus is saved from June to August.
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How do bees reproduce?
Honeybee is a kind of social animal and social insect, which is mainly composed of queen bee, drones, worker bees, etc., so how do bees reproduce? The basic introduction of honeybees is that honeybees belong to Insecta and Honeybee family, and the distribution areas of different species of honeybees are not complete.
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