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non specific :)
No beetles have bones. Therefore no beetle has a backbone. Only vertebrates have backbones. That means that ALL beetles are invertebrates.
active immunity
Correct,Insects ARE the only Invertebrates to evolve to fly!
decrease
Yes, they are. An invertebrate is any animal without a backbone. That means about 97% of all the animals in the world are invertebrates. The only animals classified as vertebrates are fish, birds, mammals, reptiles and amphibians.
Nonspecific back pain would be back pain with an unknown cause. Therefore nonspecific therapy would be either therapy of an unknown nature (ha ha) or therapy not specific to the illness/injury only. Like psychotherapy for back pain -- you could call that nonspecific therapy.
passive immunity
All phyla contain invertebrates. The only one that contains vertebrates is the phylum Chordata, but it also contains some invertebrates.
Yes when the question is incomplete, nonspecific or poorly phrased.
no it isn't all sea animals are vertebrates only turtles are invertebrates but they have a backbone too.
insects