1. If we compare photosynthesis and cellular respiration in terms of energy
conversions involved, we observe that in-
А
photosynthesis, carbon dioxide is used to produce energy.
B
photosynthesis, energy is used to produce oxygen.
cellular respiration, carbon dioxide is used to produce energy.
D
cellular respiration, energy is used to produce oxygen.

B is the answer I think

I don't know it's correct or not but I'm trying to help.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .