Those are the mammary glands in all mammals
Those are the mammary glands in all mammals
The word "mammal" derives from the mammary glands found in females that produce milk for their young.
Yes, all dolphins are mammals because they meet the five requirements of mammals:All mammals have a backbone (vertebrates) Dolphins have a backboneAll mammals have hair at one point in their life Dolphins have a mustache when they are bornAll mammals breathe air Dolphins must surface periodically to breatheAll mammals produce milk to feed their young A female dolphin's mammary glands are located on either side of the genital slitAll mammals are warm blooded Dolphins generate their own heatThis is a general fact - no one ever really "found this out." But among the earliest investigations on the relationship between land mammals and sea mammals were those of Aristotle (384-322 BC) in ancient Greece.
All human beings, and some animals (not all of them) or birds need a male to produce babies. A male [human being, animal or bird] can be a father of many children. Yes, Pigs needs a male to have babies too.
Many other organisms besides humans produce epinephrine. It is found in some plants, insects and mammals.
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To produce hormones to attract the opposite sex.
The placenta. Placentas are found in female placental mammals (most mammals are placental mammals) inside the uterus and are a passageway by which nutrients flow from the mother's bloodstream to the baby's bloodstream and by which waste products flow from the baby's bloodstream to the mother's bloodstream.
Yes - innate immunity is found in all mammals.
The ovary holds the ovules,structures that contain the female reproductive cells known as egg cells.
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The green structures are found in the cells making up the green parts of a pant and the structures are organelles called chloroplasts. Chloroplasts are unique to plants.
Meiosis typically occurs in the specialized structures called sporangia or sporophylls in seedless plants. These structures are found on the sporophyte generation of the plant, where meiosis takes place to produce spores.