Question

Choose the correct answers from the alternatives given.
In sheer numbers and distribution, which of the following groups of animal are the most successful:

• A. arthropods
• B. snails and clams
• C. vertebrates
• D. sponges

Answer 1

The correct option is A arthropods

The Phylum Arthropoda is the most successful group of animals on earth. It is thought 75-90 % of all known living and fossil organisms (estimated at over 1 million species), are arthropods. Arthropods are a phylum within the animal kingdom. They include four classes: Chelicerates (such as spiders, mites, ticks, scorpions, and horseshoe crabs), the extinct Trilobites, Crustaceans (such as lobsters, crabs, and shrimp), and Uniramians (millipedes, centipedes, and the most numerous group of all, the insects).

So, the correct option is, 'arthropods'.