During prophase 1 of meiosis, these pairs form a tetrad in a process called

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

What is thought to have caused the mass extinction at the end of the cretaceous period?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat