How Humans and Dogs Evolved Together
Dogs likely became close to humans by seeking food scraps from their camps, and less aggressive wolves were tolerated because they could warn of danger. This early cooperation led to domestication, possibly not on purpose. Dogs and humans have evolved together, even changing their bodies to better digest certain foods, like starch, as human diets changed. Dogs also adapted to different environments, such as cold climates or high altitudes, sometimes by breeding with local wild wolves. This relationship between humans and dogs is a good example of how two different species can benefit each other and evolve together.
Key Vocabulary
The process of adapting wild animals or plants for human use, often involving selective breeding to make them tamer or more useful.
Examples:
- The domestication of horses revolutionized transportation and warfare.
- Early farmers focused on the domestication of grains like wheat and barley.
- The long process of cat domestication is still not fully understood by scientists.
Animals that primarily eat meat.
Examples:
- Lions and tigers are well-known carnivores of the savanna.
- Some insects, such as the praying mantis, are also carnivores.
- The paleontologist discovered fossilized teeth indicating that the ancient creature was a carnivore.
Outdoor fires, typically used for cooking, warmth, or light by people camping or living outdoors.
Examples:
- We gathered around the campfires, sharing stories and roasting marshmallows.
- The smoke from the campfires drifted through the trees, carrying the scent of burning wood.
- Ancient humans relied on campfires for protection from wild animals.
Occurring or existing between different species.
Examples:
- The zoo organized an interspecies enrichment program to encourage interaction between compatible animals.
- Scientists are studying the potential for interspecies communication through advanced technology.
- The novel explored a unique interspecies friendship between a human and an alien.
An enzyme found in saliva and pancreatic fluid that aids in the digestion of starches.
Examples:
- Chewing food thoroughly allows amylase in saliva to begin the breakdown of carbohydrates.
- Individuals with certain digestive issues may have insufficient production of amylase.
- The laboratory test measured the level of amylase in the patient's blood to check for pancreatic problems.
Having a diet consisting primarily of meat.
Examples:
- The T-Rex was a fearsome carnivorous dinosaur.
- While some plants are carnivorous, they still derive most of their energy from photosynthesis.
- The veterinarian explained that the cat's digestive system is designed for a carnivorous diet.
Relating to the early part of the Stone Age, characterized by the use of crude stone tools and hunting and gathering as the primary means of subsistence.
Examples:
- Archaeologists uncovered Paleolithic tools at the ancient cave site.
- The Paleolithic era saw the development of early human art, such as cave paintings.
- Life in the Paleolithic period was largely nomadic, following animal migrations.
Very old or old-fashioned; primitive or from an earlier period.
Examples:
- The museum displayed a collection of archaic pottery from the Bronze Age.
- Many words in the old text were archaic and required a special dictionary to understand.
- The company's archaic accounting system was replaced with modern software.
Wild dogs native to Australia, believed to be descended from Asian wolves.
Examples:
- Dingoes are known for their distinctive howls that echo through the outback.
- The conservation efforts aim to protect dingoes and their natural habitat.
- A group of dingoes was spotted near the watering hole at dusk.
Pertaining to coevolution, where two or more species reciprocally influence each other's evolution.
Examples:
- The relationship between flowering plants and their pollinators is a classic example of a coevolutionary process.
- Parasites and their hosts often engage in a coevolutionary arms race.
- Scientists are studying the coevolutionary dynamics between certain bacteria and the human immune system.
Relating to or inherited from an ancestor or ancestors.
Examples:
- The family traced their ancestral roots back to a small village in Europe.
- Many cultural traditions are passed down through ancestral lines.
- The archaeological dig revealed ancestral burial grounds of the indigenous people.
A condition in which the body or a region of the body is deprived of adequate oxygen supply.
Examples:
- Mountain climbers often experience hypoxia at high altitudes.
- The patient's symptoms, including shortness of breath and dizziness, were consistent with hypoxia.
- Specialized training can help athletes improve their tolerance to hypoxia.
A group of vascular plants that reproduce via spores and do not have seeds or flowers.
Examples:
- The forest floor was covered with a lush carpet of ferns.
- Many ferns thrive in damp, shady environments.
- The gardener carefully transplanted the delicate ferns into the new flowerbed.
Relating to or resembling a dog or dogs.
Examples:
- The veterinarian specializes in canine health and behavior.
- The detective noticed distinct canine footprints in the mud.
- The artist captured the regal beauty of the canine subject in the portrait.
The occurrence, rate, or frequency of a disease, crime, or other undesirable thing.
Examples:
- There has been an increase in incidences of online fraud recently.
- The study recorded the incidences of allergic reactions to the new medication.
- Improved safety measures led to a decrease in the incidences of workplace accidents.
A breed of dog, often classified as a sighthound, known for its speed and slender build, originating from the Fertile Crescent.
Examples:
- The salukis gracefully chased the lure across the open field during the race.
- With their elegant appearance, salukis are often admired for their beauty.
- The ancient carvings depicted salukis alongside their human companions.
The watery liquid secreted into the mouth by glands, which aids in digestion and keeps the mouth moist.
Examples:
- Saliva plays a crucial role in the initial breakdown of food.
- The dentist explained how saliva helps protect teeth from decay.
- The dog's mouth watered, and saliva dripped onto the floor as it watched the treat.
Having a diet that includes both plants and animals.
Examples:
- Bears are omnivorous, consuming berries, fish, and small mammals.
- Humans are considered omnivorous, adapting to various food sources.
- The scientist observed the monkey's omnivorous eating habits, noting its consumption of both fruits and insects.
A close and often long-term interaction between two different biological species.
Examples:
- The relationship between the clownfish and the sea anemone is a classic example of symbiosis.
- Mutualistic symbiosis benefits both organisms involved in the interaction.
- The city's economy thrived due to the symbiosis between its manufacturing and technology sectors.
Pertaining to or characterized by symbiosis; involving a close and mutually beneficial relationship between different organisms.
Examples:
- The fungi and algae form a symbiotic relationship to create lichen.
- Their business partnership proved to be a highly symbiotic arrangement, benefiting both parties.
- The researchers studied the symbiotic interactions between gut bacteria and human health.