Ican't show the picture but its two atoms that are side by side and their rings are intercepting and it says what does this picture represent? a. atoms that are unstable b. atoms with an ionic bond c. atoms with a covalent bond d. atoms that are ions

Me with biology endocrine system crossword also image left i need with hw

Which direction does the energy flow in this energy pyramid ?

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.