Answer:
Many small organisms can be preserved within these layers of sediment through time. The changing abundances of these fossils through time can tell us whether a change in the environment or climate was gradual or abrupt. Studying fossil pollen and other fossils helps scientists to learn more about climate change.
Answer:
(of a substance) become concentrated inside the bodies of living things.
Explanation:
Answer:
During the day plants produce oxygen by splitting water molecules in the light-dependent reactions of photosynthesis. At the same time plants use cellular respiration to produce some of the carbon dioxide needed by the light-independent reactions to make sugars. During the night plants produce carbon dioxide because cellular respiration takes place
Explanation:
Photosynthesis is the manufacture of organic food materials in presence of sunlight energy while respiration is the breakdown of food materials in the presence of oxygen. Photosynthesis produces oxygen as a by-product that is used in respiration. Respiration produces carbon dioxide that is used in photosynthesis.
