How does the current, or sixth, mass extinction differ from the past five mass extinction events?
a.
the sixth mass extinction is believed to be caused by human-related factors.
b.
the sixth mass extinction is believed to be caused by natural forces.
c.
the sixth mass extinction is believed to affect relatively fewer species.
d.
the sixth mass extinction is believed to affect relatively fewer areas.

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

is in the form atp or adenosine triphosphate

it is either c or d and i know for sure it is not a or b

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.