Why it is important for the cell receptor to match the messenger for proper communication?

What came first the elephent or the crocodile

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?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities