Which of these exhibits a dorsal nerve chord at some stages of its development?

a. a grasshopper
b. a snail
c. a jellyfish
d. a lancelet

plz

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

The transport tubes for food coming down the plants are called?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated