Which of the following are true concerning living things? check 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.

ThThey undergo chemical reactions to use energy they acquire from the environment.ey are composed of molecules that contain carbon-carbon bonds.

Type in the minus sign

This is s cute awee : (( . well if she's showing you signs that she may like you , then shoot your shot ! don't be afraid . & if you're unsure that she's giving you these signs , then wait out for a little bit . most girls are different . some may act really sweet , but only bc you're a good friend of hers . that , or she might like you . you just never know . but i think you should sit down with her & tell her how you feel . but don't be awkward & shy . just be straight up & tell her how you feel . if the feelings aren't mutual , then don't cry about it . you need to respect her decision & look for others in the world . feelings can be difficult & confusing , but don't be afraid to show them . i say you play it out & if you're still unsure about it , talk to her . - rach