Answer
if one muscle shorten during contraction the opposing muscle across the joint must relax
Answer:
Funding for alternative energy search often changes with the cost of fossil fuels. It is also influenced by investments in stopping pollution and conserving natural resources. For example, an energy crisis in the 1970s led to more funding for oil alternatives.
Explanation:
<span>Energy must constantly flow through an ecosystem for the system to remain stable.</span> it means that organisms must eat other organisms
Thus, Cactus survive with the help of its "green stems" and "transpiration".
