Why does olive oil have a lower melting point than butter fat?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Could someone me with number one you

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?