10.dry and hot conditions 11.C4 plants 12.bundle sheet cells 14.plasmodesmata 15)PEP carboxylase 16) bundle sheet cells 17) pineapple 18) oxygenase activity in C3 plants in general photo respiration does not occur in C4 plants if takes place carboxylase activity will involve 19)corn Solution 10.dry and hot conditions 11.C4 plants 12.bundle sheet cells 14.plasmodesmata 15)PEP carboxylase 16) bundle sheet cells 17) pineapple 18) oxygenase activity in C3 plants in general photo respiration does not occur in C4 plants if takes place carboxylase activity will involve 19)corn.