Which of the following cells could not contain tetrads? (a)diploid cells
(b)haploid cells
(c)plant cells
(d)animal cells

with no doubt I think the answer is diploid itdoes not access meiosis at all

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.