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Different taxa show different cellular and acellular envelopes englobing the vitelline membrane. [2] [5] Fertilization is the fusion of gametes to produce a new organism. In animals, the process involves a sperm fusing with an ovum, which eventually leads to the development of an embryo. Depending on the animal species, the process can occur ...
The following is a list of selected animals in order of increasing number of legs, from 0 legs to 653 pairs of legs, the maximum recorded in the animal kingdom. [1] Each entry provides the relevant taxa up to the rank of phylum. Each entry also provides the common name of the animal.
The two-headed calf was born in Fowler, Michigan, in 1943 and is often paired with a dwarf calf that was born on a farm in Owendale, Michigan, in 1909. A full taxidermy of a two-headed calf can be seen advertising ice cream for College of the Ozarks in Branson, Missouri, where it was delivered by the students.
An endangered Asian elephant calf was born last week at the Houston Zoo.. The Texas zoo said 34-year-old Asian elephant Shanti gave birth to 314-pound Kirby on November 15 at 3 p.m. CST. Shanti ...
Charolais calves which were transferred, as embryos, into their Aberdeen Angus and Hereford recipient mothers. Calves may be produced by natural means, or by artificial breeding using artificial insemination or embryo transfer. [5] Calves are born after nine months. They usually stand within a few minutes of calving, and suckle within an hour.
The second elephant calf in two weeks has been born at a California zoo. African elephant Amahle gave birth early Monday morning, according to the Fresno Chaffee Zoo. The new additions are the ...
Another example is the blue wildebeest, the calves of which can stand within an average of six minutes from birth and walk within thirty minutes; [5] [6] they can outrun a hyena within a day. [ 7 ] [ 8 ] [ 9 ] Such behavior gives them an advantage over other herbivore species and they are 100 times more abundant in the Serengeti ecosystem than ...
Giraffe gestation lasts 400–460 days, after which a single calf is normally born, although twins occur on rare occasions. [105] The mother gives birth standing up. The calf emerges head and front legs first, having broken through the fetal membranes , and falls to the ground, severing the umbilical cord . [ 17 ]