LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

DIVERSITY AMONG LIFE FORMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is an invertebrate?
A
An animal with a backbone
B
a mammal
C
An animal without a backbone
D
birds
Explanation: 

Detailed explanation-1: -invertebrate, any animal that lacks a vertebral column, or backbone, in contrast to the cartilaginous or bony vertebrates. More than 90 percent of all living animal species are invertebrates.

Detailed explanation-2: -Insects, annelids, mollusks, echinoderms, protozoa, crustaceans, and arachnids are all invertebrates.

Detailed explanation-3: -Sponges (Porifera) Comb jellies (Ctenophora) Medusozoans and corals (Cnidaria) Acoels (Xenacoelomorpha) Flatworms (Platyhelminthes) Bristleworms, earthworms and leeches (Annelida) Insects, springtails, crustaceans, myriapods, chelicerates (Arthropoda) More items

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