He monocots<span> or monocotyledons have, as the </span>name<span> implies</span>
        
             
        
        
        
The correct answer is B. Ordovician period
Explanation:
Plants are mainly multicellular organism that depends mainly on photosynthesis to obtain energy, this includes a wide variety of species such as grass, flowering plants, trees, shrubs, etc. Additionally, plants are considered as one f the two major divisions or kingdoms along with animals. In terms of history, it has been determined first land plants appear during the mid-Ordovician period around 470 million ago, although organisms that were the origin of land plants developed in water in previous periods, also by the Devonian period a wide variety of plants have emerged with features that are still part of plants nowadays. Therefore, plant life first appeared on land during the Ordovician period.
 
        
             
        
        
        
D, Photosynthesis is with plants.
        
             
        
        
        
Perhaps the best known unconfined aquifer is the Ogallala. In many places this aquifer is near the surface and recharge depends on water that collects at the surface in wetlands. ... A playa lake is a naturally occurring wetland (averaging about 17 acres) formed when rain fills small depressions in the prairie. (https://texasaquaticscience.org/aquifers-springs-aquatic-science-texas/) 
Hope this helps
 
        
             
        
        
        
Answer:
The correct answer will be option-C.
Explanation:
The production of ATP from ADP and Pi (inorganic phosphate) catalyzed by an enzyme known as ATP synthase.
ATP synthase is made up of two main regions called F₀ and F₁ in which F₀ is embedded in the membrane and acts as a pump through which proton flux takes place. The F₁ unit is the rotating unit of the ATP synthase which rotates due to energy provides by the protons during proton flux.
When proton moves through F₀  unit down their concentration gradient, it provides energy to the F₁ subunits which bind ADP and inorganic phosphate to release ATP.
Thus, Option-C is the correct answer.