A lake is so deep that light cannot reach all the way to the bottom, so the photosynthesis occurs in the top layers. A pond can have rooted plants, because light reaches down to the very bottom.
I like 4 the best. If an organism is covered by sediment before the body decays the sediment can harden around the decaying body and the imprint will be preserved in the hardened sediment.
The G-protein couples receptors are among the most diverse group of the membrane protein receptors. The GPCRs attaches a wide variety of the signalling molecules. They interact with the G proteins which are present in the membrane. Conformational changes occur in the GPCR, when the external signalling molecules attaches to it. The GPCR is desensitized after it becomes activated.
Hence, the answer is 'Option D - desensitized'.
Answer:
Acids
Explanation:
Acids are ionic compounds that produce positive hydrogen ions when dissolved in water. Acids taste sour. They conduct electricity when dissolved in water. They also react with metals to produce hydrogen gas.
