Which term describes the individual in a pedigree whose phenotype was first brought to the attention of a medical researcher?

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully