History of animals and Domestication
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The document discusses the history and domestication of animals. It provides timelines for the emergence of life on Earth, with the first animals appearing around 2.5 billion years ago. Around 2.2 billion years ago, oxygen in the atmosphere allowed organisms to move from water to land. Wolves were the first animal domesticated, around 12,000 years ago, as they began hanging around villages for food. Cats were domesticated around 3,500 years ago, with early pictures found in Egyptian tombs.
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PresentacióN1
The document categorizes different types of animals including wild animals, aquatic animals, domestic animals, farm animals, and insects. It provides lists of example animals that fall under each category and includes videos related to each animal type. The document also contains interactive activities that quiz the reader on classifying animals into the correct categories.
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This document discusses different types of animals and how they interact with humans or live in the wild. Some animals like pigs, cows, and hens provide food and live on farms. Other animals like sheep provide materials for clothing. Pets like dogs and cats provide fun and company. Wild animals like elephants, giraffes and bears live independently in nature.
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This document lists common domestic animals and their category. It includes cows, sheep, buffalo, oxen, donkeys, dogs, camels, goats, horses, cats, yaks, hens, ducks, geese, pigs, rabbits, and pigeons. The presentation was created by Prashant Mahajan to help his son with school assignments and shares information on domestic animals.
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Domestic animals are species of vertebrates that have been domesticated by humans to live and breed in a tame condition while depending on humans for survival. The most popular domestic animals include dogs as the first domesticated animal and most popular pet, hamsters as a very common garden and free-roaming pet, and cats as the second domesticated animal often kept as a household pet.
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Domestic animals such as cows, pigs, sheep, dogs and cats live near or with humans, providing services like food, clothing materials, and companionship. Wild animals like elephants, giraffes and bears live independently in nature, surviving by hunting, fishing or gathering plants for food. Domestic animals rely on humans while wild animals live freely without human support or interaction.
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Protein synthesis involves DNA being transcribed into mRNA which is then translated into proteins with the help of tRNA and rRNA. There are three main types of RNA - mRNA carries the genetic code from DNA to ribosomes, tRNA carries amino acids and bonds to mRNA through anticodons, and rRNA makes up ribosomes where protein synthesis occurs. The sequence of codons in mRNA determines the specific amino acid sequence of the resulting protein.
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DNA replication involves unwinding the DNA double helix into single strands. Each single strand then serves as a template for new DNA synthesis. Enzymes such as helicase unwind the DNA and DNA polymerase adds complementary nucleotides to each new strand, resulting in two identical copies of the original DNA. There are proofreading enzymes that check the newly synthesized DNA for errors and repair mechanisms that help prevent mutations from environmental damage.
DNA Function and Structure Notes
DNA contains all of an organism's genetic information and is found in the cells of all living things. DNA is made up of long chains of nucleotides, which consist of a sugar, phosphate, and one of four nitrogen-containing bases. The order of these bases in the DNA determines an organism's traits by encoding genes. James Watson and Francis Crick discovered that DNA exists as a double helix structure, with the bases pairing together in a complementary way between chains.
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Mitosis is the process of cell division that produces two daughter cells from one parent cell. It has four main phases: prophase, metaphase, anaphase and telophase. During interphase, the cell's DNA is replicated in S phase in preparation for division. In mitosis, the chromosomes condense and align at the center of the cell before being separated and moved to opposite sides of the cell. Finally, in telophase and cytokinesis, the cell cytoplasm divides and separates to form two new daughter cells each with identical DNA to the original parent cell.
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- 1. History & Domestication of Animals By Mr. “Go Knights” Chapman
- 4. Characteristics of Animals Kingdom: Animalia •Multicellular •Eukaryotic •Heterotrophic •No cell walls
- 5. History of Animals • The Earth is about how old? • 4.5 Billion years old • The first sign of life was about 3.5 BYA., which was bacteria or algae. • The first animal showed up around 2.5 BYA, which were sponges.
- 9. Animal History • What do you think happened 2.2 BYA that allowed organisms to move out of water and onto land? • Allowed animals to move to land: • 1. Oxygen was produced by algae/bacteria in the atmosphere. • 2. The free O2 formed the ozone layer, which filters UV rays.
- 11. Important Dates • First invertebrates appeared on land about 420 MYA. • Fish 400 MYA • Amphibians appeared about 370 MYA. • Reptiles appeared about 300 MYA.
- 12. Important Dates • First Birds and mammals appeared about 180 MYA. • Dinosaurs become extinct about 135-70 MYA, which allowed mammals to dominate.
- 13. Domestic. Of Animals • Most likely began when hunters brought back the young of animals they killed. What do you think was the first animal domesticated? Wolves were first animal to be domesticated.
- 15. Wolves • Hung around villages looking for meals • Wolf cubs were domesticated for companion • Used for: • Warning • Protection • Hunting • First dog jawbone found in a cave in Iraq – About 12,000 year ago
- 17. Cats • Cats date back about 3,500 years ago • Where do you think first pictures were found? • Egyptian tombs • Cats brought pleasure, companionship, and controlled rats and mice.