The finches that darwin studied in the galapagos islands have evolved with different types of beaks: drilling, cracking, tearing, and fishing. this is an example of
a) predation.
b) adaptive radiation.
c) warning coloration.
d) protective resemblance.

The correct answer is Adaptive radiation.

Adaptive radiation can be defined as the diversification of organisms having common ancestor that later on become adapted to different environmental conditions.

Due to different environmental conditions, these organisms evolve and become diversified to more specialized types.

For instance, Darwin's finches on the Galapagos islands evolved with different beak types ( like drilling, cracking, tearing, and fishing) due to availability of different types of food.

Therefore, they are example of adaptive radiation.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.

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.