Gradeba 4/8/2018 11:55 PM 2.3/10 3/28/2018 07:57 PM -Print ?Calculator -4 Period
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Gradeba 4/8/2018 11:55 PM 2.3/10 3/28/2018 07:57 PM -Print ?Calculator -4 Periodic Table Question 28 of 30 Map Sapling Learning Identify which of the following characteristics describe monotremes, marsupials, eutherians, or all three types of mammals. Marsupials Eutherians All three mammals pregnancy is short, young develop in womb with a placenta pregnancy is long. covered in hair actual longer time nursing have mammary glands shorter time nursing carry newborn young in reproduce by laying eggs to feed young Previous ?Give Up & View Sotton Check Answer ?Next Exit F2 Oo FS F7 4Explanation / Answer
Monotremes: Reproduce by laying eggs
Marsupials: Actual pregnancy is short, longer time nursing, Carry newborn young in a pouch
Eutherians: Young develop in womb with a placenta, Actual pregnancy is long, shorter time nursing.
All three Mammals: Have mammary glands to feed young, Covered in hair (Hair in eutherians and Fur in monotremes and marsupials)
Other information:
Montremes or Prototheria are oviparous (egg laying) animals. They are regarded as most primitive mammals. Examples include Duckbiled platypus, Echnida. They have cloaca which serves as both an_us as well as urinary tract and for reproduction(hence the name monotreme). Nip_ples are not found in monotremes.
Marsupials or Metatheria have pouch where young develops due to short gestation period. Examples include Kangaroos, Koala, Numbat, Wombat, Opossums etc
Eutherians include Artiodactyls, Peissodactyls, Cetaceans, Edentates, Lagomorphs, Primates, Proboscideans, Chiropterans, Rodents, Sirenians etc
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