Answer :There was enough oxygen in the atmosphere to support a major burst of life on Earth
Explanation:
The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when there was enough oxygen in the atmosphere to support a major burst of life on Earth
For the first half of the Earht's history, there was no oxygen in the atmosphere. It was inhabited only by single-celled organisms.Of those simple life forms, the cyanobacteria may have. evolved a way to take energy from sunlight, and used it to make sugars out of water and carbon dioxide. They used the same chemical process we know as photosynthesis. This released vast quantities of oxygen into the atmosphere and triggered the evolution of complex life.
THE CELL-MATCHING Nome Kocelle Match the descriptions in Column with the name in Column Column ! - 1. holds nucleus together a. Golol bodies 2 surface for chemical activity b. nucleus 3. units of heredity ochromosomes 4. digestion center d. VOUI 5. where proteins are made o rosomes 6. structures involved in mitosis in animal cells only 1. endoplasmic reticulum 7. microscopic cylinders that support nucleor membrane and give the cell shape h controles 8. shapes and supports a plant coll cytoplasm 9. stores and releases chemicals chlorophy 10. food for plant cells is made here k chloroplasts 11. spherical body within nucleus 1. col (plasma) membrane 12. controls entry into and out of coll m. cell wall 13. fraps light and is used to produce n. mitochondria food for plants olysosome 14. chromosomes are found here p. genes 15. Jellylike substance within cell a nuclear pore 16. contains code which guides all cell nucleolus activities S. plastid 17. minute hole in nuclear membrane 18. "powerhouse of cell 19. contains water and dissolved minerals t. microtubule 20. stores food or contains pigment Biology 1F8765 cinstructional Fair,
Ribosomes. Ribosomes which synthesize proteins are found in the rough endoplasmic reticulum.
The energy pyramid (also called ecological pyramid) quantifies the energy transfer from one organism to another along the food chain. Energy decreases as you move through the levels from the bottom to the top of the pyramid.At the bottom are the p<span>roducers which bring energy from nonliving sources (sun) into the community (photosynthesis).
</span><span><span>After the producers (above them) are the primary consumers. They eat the producers, which makes them herbivores. Above them are the s</span><span>econdary consumers. They eat the primary consumers, which makes them carnivores. And at the top are the </span><span>Tertiary consumers.</span></span>
I believe that one water molecule of water is attracted to another because of its polarity.