Answer: alternative A
Explanation: The deeper the layer in water, the <u>less light reaches it</u>. In deeper layers, therefore, it becomes difficult, if not impossible, to photosynthesis to occur. Having in mind that <u>phytoplankton and photosynthetic organisms depend on photosynthesis to survive,</u> they won't appear in such dephts.
It's B. 10 to 20 percent.
Deoxyribose is the substances along with sugar and phosphates . The rungs of the ladder are made up of 5 nitrogenous bases adenine, thymine, cytosine, and guanine.
Melton include all that o move independently of ocean currents.
