Ajellyfish is a type of cnidarian, a squid is a type of mollusk and a dolphin is a type of vertebrate which two characteristics are present in both a squared and a dolphin but not present in a jellyfish

Ans.  

Jellyfishes are multicellular, marine organisms that belong to phylum Cnidaria. Squids are a type of mollusks, having eight arms and tentacles. Dolphin is a vertebrate that belongs to class mammalia. They produce young, have fur or hairs on the body and complex organ system.

Both squid and dolphin have complex organ systems, nervous system, while complex organ systems are absent in jellyfish.

Both squid and dolphin are triploblastic (having three tissue layers), while jellyfish is diploblastic (having two tissue layers).

the answer is c) abandoned properties that are contaminated with hazardous materials.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."