1. Which of the following can happen if the kidneys fail?
a. Toxic wastes can accumulate in plasma.
b. Blood-plasma ion levels can increase.
c. Kidney dialysis may be necessary.
d. All of the above

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.

not always but somethings can be reproduced in a laboratory.

segmented body, an exoskeleton made from chitin, and joint appendages.