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Most mammals are viviparous, giving birth to live young. [1] However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. [2] In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian ...
Pregnant male seahorse. Male pregnancy is the incubation of one or more embryos or fetuses by organisms of the male sex in some species. Most species that reproduce by sexual reproduction are heterogamous—females producing larger gametes and males producing smaller gametes ().
The traditional modes of reproduction include oviparity, taken to be the ancestral condition, traditionally where either unfertilised oocytes or fertilised eggs are spawned, and viviparity traditionally including any mechanism where young are born live, or where the development of the young is supported by either parent in or on any part of their body.
Animals make use of a variety of modes of reproduction to produce their young. Traditionally this variety was classified into three modes, oviparity (embryos in eggs), viviparity (young born live), and ovoviviparity (intermediate between the first two).
When people think of cute baby animals, they often reference kittens, puppies, bear cubs or even piglets. ... Anteaters are generally solitary by nature, and give birth to young one at a time ...
Marsupials give birth at a very early stage of development; after birth, newborn marsupials crawl up the bodies of their mothers and attach themselves to a teat, which is located on the underside of the mother, either inside a pouch called the marsupium, or open to the environment. Mothers often lick their fur to leave a trail of scent for the ...
Nolwazi gave birth Aug. 16 to the first male calf born at the Chaffee Zoo, which is 95 years old, staffers said previously. It didn’t take long after being born for Amhle’s baby to be on his feet.
Similarly, the male Owl monkey acts as the main caregiver and is crucial to the survival of his offspring. If a female gives birth to twins, the male is still responsible for transporting both the infants. [24] In the absence of a father, infant mortality increases in both these species and it is unlikely that the infant will survive.