Which is these cells of the dermal tissue prevent water loss and control gas exchange? phloem cells companion cells parenchyma cells guard cells

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Some technological solutions to problems like global warming meet the specific needs and situations of local communities. an example from india involves converting the solid waste from cattle into clean-burning fuel for cooking. this reduces the amount of greenhouse gases, specifically methane and carbon dioxide, released into the environment from wood fires. when evaluating the feasibility of implementing this solution, computer models are used to weigh costs against benefits. what factor is least likely to impact the decision on adopting this technology?

What was the land like over 500 million years ago? what was under the sea?