Biology, 07.12.2020 22:10, rleiphart1
Study the timeline. A timeline. 4.5 billion years ago, Earth is formed. 4.3 billion years ago, Earliest water. 4.1 billion years ago, Single celled life. 3.5 billion years ago, Earliest oxygen and photosynthesis. 2.5 billion years ago, Complex single celled life. 1.5 billion years ago, Multi cellular life. 500 million years ago, Land life. 300 million years ago, Dinosaurs. 200 million years ago, Mammals. 130 million years ago, Flowers. 5 million years ago, Humans. Based on fossil evidence, about how long ago did the first single-celled life form appear on Earth? 130 million years ago 1.5 billion years ago 2.5 billion years ago 4.1 billion years ago
Answers: 2
Biology, 22.06.2019 05:30, 100738
Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim
Answers: 1
Biology, 22.06.2019 06:10, 21121212cutecheytown
Which process of living things produces water that enters the water cycle
Answers: 1
Biology, 22.06.2019 11:30, lovelifekristy
In "the pig," what is the main effect that the piglet initially has on kibuka?
Answers: 2
Biology, 22.06.2019 16:00, postorivofarms
Which of these outcomes is a negative impact of postindustrial societies on the environment? a. nomadic ways b. overpopulation c. overgrazing d. resource renewal
Answers: 3
Study the timeline. A timeline. 4.5 billion years ago, Earth is formed. 4.3 billion years ago, Earli...
Mathematics, 25.06.2019 23:30
Geography, 25.06.2019 23:30