To create bacteria that produce human insulin scientist insert the human gene of interest into the bacterial
a. circular chromosome.
b. plasmid.
c. cell wall.
d. cell membrane.

answer; i believe its (ovulation);

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.