If the number of tertiary consumers is increased more than it is necessary, it causes the imbalance of ecosystem. How?​

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?