Why do cool rocks material sinks when convection takes place in the mantle?

What is the difference between how ionic and covalent bonds form

1) strawberry plants typically reproduce by making runners, which are miniature versions of themselves, that grow off of the roots and stems of the parent. this type of vegetative reproduction is known as a) pollination. b) fragmentation. c) binary fission. d) vegetative propogation.

What characteristic make legumes a good food source for food insecure populations