In what phase of meiosis are tetrads of homologous pairs lined up along the center of the cell and attached to the spindle fibers?

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct

What is the next step in muscle contraction after the actin changes shape