certain kinds of shells are always found in rock layers with plants fossils. Dinosaur fossils show up only in layers above or with plant fossils. What does this tell you about when these orangisms lived?

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

Select the correct answer from each drop-down menu proteins are

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12