Which of the following are true concerning living things? choose all that apply.

they contain a vital force absent in nonliving things.
they are composed of molecules that contain carbon-carbon bonds.
they undergo chemical reactions to use energy they acquire from the environment.
they do not require catalysts to sustain their living state.

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

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?

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000