Gerri says that spiders use their fangs for the same purpose that crustaceans use their claws. Alana disagrees and says that spiders use their fangs for the same purpose that centipedes use their claws. Which best explains who is correct?

A) Alana is correct because spiders use their fangs to inject venom. Centipedes use their claws for this same purpose.

B) Alana is correct because spiders use their fangs to catch prey. Centipedes use their claws for this same purpose.

C) Gerri is correct because spiders use their fangs to inject venom. Crustaceans use their claws for this same purpose.

D) Gerri is correct because spiders use their fangs to catch prey. Crustaceans use their claws for this same purpose.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.