I believe it's "pollen".
When the pollen grains are washed down into lakes/rivers, scientists can take a sample of the sediment layers and see what plants were growing at that time. They can then make inferences about the climate and how that affected the plants growing there.
Hope this helps!
Answer:
Deletion and Insertion
Explanation:
DNA and RNA are read in frames of 3 base pairs, called codons. Adding or deleting a base pair shifts the arrangement of the following base pairs, changing the content of the following codons.
Answer: A. combustion
Explanation: During complete combustion, carbon and hydrogen react with oxygen (O2) to produce carbon-dioxide (CO2) and water (H2O). The carbon-dioxide produced is released into atmosphere and is utilized for carbon fixation and recycling.
Organs.
As with organelles, organs serve a specific function.
