no they do not
kinkajous are laughing mammals
gills
buhb
Marine mammals have adaptations such as a thick layer of blubber for insulation, a counter-current heat exchange system to retain body heat, and a low surface area to volume ratio to minimize heat loss. They also have specialized blood circulation that helps in retaining heat in the body.
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Internal fertilization and internal development of the fetus
Mammals' unique traits, such as fur or hair for insulation, mammary glands for milk production, and a complex brain for problem-solving and adaptability, have likely contributed to their ability to survive and thrive in various environments. Additionally, their endothermic metabolism allows them to regulate their body temperature internally, giving them an advantage in diverse climates.
angel + anton aa
Mammals are a large group of species that eat all types of food...their teeth are specialized.
A bird flies because of a variety of specialized adaptations. THAT IS WHY A BIRD FLIES!
Giraffes have a similar excretory system to other mammals. They eliminate waste through their kidneys, which filter blood to produce urine. The urine is then stored in the bladder and excreted through the urethra. Giraffes also have specialized adaptations in their kidneys to help conserve water in their arid habitats.