Cerise is a schoolteacher. she is teaching her students that chemicals dumped in the ocean have adverse consequences on humans. she explains how the chemicals travel through the trophic levels and magnify at each level ultimately reaching humans at dangerously high levels. which phenomenon is cerise teaching?
a.
food chain
b.
food web
c.
ecological pyramid
d.
bioaccumulation
e.
isolated ecological system

D. Bioaccumulation

Explanation: Basically what bioaccumulation is when an organism absorbs a substance at a rate faster than that at which the substance is lost or eliminated by catabolism and excretion.

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.