Polar Covalent Bonds Are Formed When the Electrons in the Bond

question 28

Multiple Choice

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei.Which one of these molecules contains polar bonds?

• A)molecular oxygen
• B)methane
• C)propane
• D)water

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Definitions:

Meroblastic Cleavage

Cleavage pattern observed in the telolecithal eggs of reptiles and birds, in which cleavage is restricted to a small disc of cytoplasm at the animal pole. Compare with holoblastic cleavage.

Cleavage Pattern

The division of cells in the early embryo, determining the spatial arrangement of cells in the resulting organism.

Isolecithal Eggs

Eggs with a small amount of evenly distributed yolk, typically found in mammals including humans.

Telolecithal Eggs

Refers to eggs with a large amount of yolk concentrated at one end, typical in birds and reptiles.