Astronauts returning to Earth from an extended stay in space have to be extremely careful not to break a bone. It takes several weeks to restore normal bone strength. Which would be the best regimen to rebuild the lost bone tissue?Select one:a. Several weeks of swimming will rebuild all lost bone mass. b. Stay inactive, avoiding exercise until the lost bone tissue is rebuilt. c. Start with walking and build up to jogging, with an extra regimen of light weight lifting in the gym. d. Hit the gym and get going with a few weeks of heavy weight lifting.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

explanation:

mark brainliest and have a great day!

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

i think that it is plants