9. which of the following lists events in the order in which they occurred? first eukaryotic cells, evolution of photosynthesis, cambrian explosion, first land plants, first animals first eukaryotic cells, first animals, cambrian explosion, first land plants, evolution of photosynthesis evolution of photosynthesis, first eukaryotic cells, first animals, cambrian explosion, first land plants cambrian explosion, first eukaryotic cells, first animals, first land plants, evolution of photosynthesis evolution of photosynthesis, first eukaryotic cells, cambrian explosion, first land plants, first animals

The correct answer will be option- evolution of photosynthesis, first eukaryotic cells, first animals, Cambrian explosion, first land plants.

Explanation:

The origin and evolution of life started around 3.8 billion years ago. After this period life evolved and diversified adapting in the environment. The evolution of life is arranged on a geological time scale in chronological order on the basis of paleontological studies.

The studies have revealed that bacteria became photosynthetic utilizing the carbon dioxide and sunlight to make food around 2.15 billion years ago. After the evolution of photosynthetic bacteria, cells with well-defined organism came into being around 2 billion years ago which formed an endosymbiotic relationship and formed multicellular organisms. this multicellular organism formed the first simple animals around 900 million years ago in water. Around 543 million years ago the Cambrian explosion took place after which first land animals and plants appeared around 465 million years ago.

Thus, the selected option is the correct answer.

answer; i believe that the correct answer is (b) melosis; plz check first.good luck

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

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