37 Questions
What characteristic ensures the constant internal temperature of mammals?
Endothermic nature
Which anatomical feature is primarily associated with feeding the young in female mammals?
Mammary glands
What is the primary function of the fur covering on mammals?
Provide insulation
Which feature do all mammals have that aids in thermoregulation?
Endothermic nature
What type of glands in mammalian skin are responsible for producing sweat and oils?
Sweat glands
Which group of mammals are the only oviparous ones?
Monotremes
In which regions do marsupials predominantly originate?
Australia and South America
What characteristic is unique to the group of monotremes?
They have glándulas mamarias without nipples.
Which animal group includes the brown bear?
Carnivores
What is the primary characteristic of ungulates?
They have hooves.
Which of the following animals is classified under the group of cetaceans?
Killer whale
What characteristic allows birds to maintain a constant body temperature?
Endothermy
Which part of a bird's anatomy primarily helps in flight by reducing weight?
Hollow bones
What is the primary function of feathers in birds?
Temperature regulation and aiding in flight
How many toes do birds typically have on their hind limbs?
Four
What is the specific type of eagle that is native to Spain referred to in the description?
Iberian Imperial Eagle
Which category does the Emu belong to?
Corredoras
Which of these birds is known for having excellent night vision?
Lechuza
Which bird is characterized by long legs and is often associated with cranes and herons?
Garza imperial
Which category does the Malvasía belong to?
Anátidas
The Urogallo is closely associated with which group of birds?
Chickens, turkeys, and peacocks
What is the main function of the air sacs in birds?
To serve as a reserve of air and facilitate flight
Which part of a bird's digestive system stores and softens food before digestion?
Buche
Which type of beak is found in insectivorous birds?
Fino and corto
What is the function of the molleja in birds?
It grinds food with the help of stored pebbles
What adaptation helps birds to have a highly developed sense of sight?
Having three eyelids, one of them transparent
What enables birds to produce a variety of songs?
The siringe in their trachea
What reproductive characteristic is associated with birds?
They are oviparous and have internal fertilization
What is a common reason for bird migrations?
To escape unfavorable conditions
What crucial role does the placenta play in the development of mammal embryos?
It supplies nutrition to the fetus inside the mother.
Why do herbivorous mammals generally have larger and more complex digestive systems?
To efficiently digest and break down plant materials.
Which feature is common to all mammalian respiratory systems?
Lungs for breathing air.
What type of mammals have adapted their limbs into flippers?
Marine mammals
What is the primary reason for the internal fertilization observed in mammals?
To provide a protected environment for the developing embryo.
Which of the following statements about mammalian nervous systems is accurate?
They are the most complex and developed among animals.
What distinguishes mammalian sensory organs compared to other animals?
They are typically highly developed.
What is a key characteristic of viviparous mammals?
Young develop inside the mother's uterus.
Study Notes
Characteristics of Mammals
- Mammals are endothermic, meaning they maintain a constant body temperature
- They have four limbs, normally four legs
- Their bodies are covered with fur, which insulates them
- They have glands in their skin that produce sweat and oils
- Females have mammary glands, which produce milk to feed their young
Classification of Mammals
- Monotremas: oviparous, have mammary glands without nipples, live only in Australia and New Guinea, examples: platypus and echidnas
- Marsupials: viviparous, but lack placenta, examples: kangaroo and koala
- Placentals: rest of mammals, have placenta, subgroups: carnívoros, quirópteros, roedores, ungulados, primates, cetáceos
Characteristics of Birds
- Endothermic, maintaining a constant body temperature
- Have four limbs, with posterior limbs as legs and anterior limbs as wings
- Bodies are covered with feathers, which aid in maintaining body temperature and flight
- Have an aerodynamic shape, facilitating flight
- Bones are thin and hollow, reducing weight and facilitating flight
Vital Functions of Birds
Nutrition
- Pulmones connected to air sacs, serving as an air reserve and facilitating flight
- Double circulatory system
- Diverse diet, with different types of beaks adapted to each diet
- Digestive system includes buche, where food is stored and softened, and molleja, where stones aid in digestion
Relation
- Highly developed sense of sight, with transparent third eyelid
- Emission of various songs using a specialized organ, the syrinx
- Great mobility thanks to flight
- Many species migrate to escape unfavorable conditions
Reproduction
- Oviparous, with internal fertilization
- Lay eggs in nests, incubating them until hatching
- Care for and feed their young until they are independent
Vital Functions of Mammals
Nutrition
- Double circulatory system and respiration through lungs
- Diverse diet, with adaptations to each type: herbivores, carnivores, omnivores
- Dental structure adapted to each diet type
- Digestive system adapted to diet type
Relation
- Complex and developed nervous system
- Developed sense organs
- Most mammals move on four legs, except some with flippers for swimming or wings for flying
Reproduction
- Internal fertilization, mostly viviparous
- Fetal development in the uterus, with placenta formation and nourishment
- Mothers nurse and care for their young until independence
Learn about the main characteristics of mammals, including being endothermic, having four limbs, and being covered in hair.
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