Amino acids which forms the mesh like structure in plasma membrane of most of the bacteria.
Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages. Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.
Answer:
Euglena have diversed nutritional requirements. They are autotrophic when kept in light and heterotrophic when deprived of light.
The Euglena contains chloroplast in it to perform photosynthesis in the presence of light.
When the Euglena is kept in the dark it starts deriving energy from the organic matter around it and shows heterotrophic mode of nutrition.
When light will be provided to Euglena it will start resynthesizes its photosynthetic pigment and it will start perform photosynthesis.
Your answer is A. <span>Some animals exhibit similar proteins.
(I deleted the other answers so future viewers won't get confused.)</span>
Carbon 14 isotope is used to determine the age of dead plants like fossils and animals and stones etc. The age determination of very old objects based on carbon 14 isotope is called carbon dating.
