Crossing over is an event during mciosis that dramatically increases variation in offspring. This event occurs between what structures?
a. Chiasma
b. Sister chromatids
C. Nonhomologous chromosomes
d. Nonsister chromatids

In 1992, hurricane andrew left a wake of destruction through florida. one victim of the storm was a reptile-breeding facility. over 900 burmese pythons were set free, and today thousands of pythons live in florida. these pythons are an invasive species, or a harmful species not native to the region. 1. what impacts do you think the burmese pythons might have on local ecosystems