Which kind of electrical charge is found on a hydrogen atom. of a polar water molecule?
a: a positive charge caused by a covalent bond with oxygen
b: a negative charge caused by a covalent bond with oxygen
c: a negative charge caused by an ionic bond with oxygen
d: a positive charge caused by an ionic bond with oxygen

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

Ais a group of individuals of the same that exist together in the same place at the same time