How do you get rid of homologous chromosomes?

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?