As they are unknown, the exact answer is unknown. However an estimate might be one or two orders of magnitude times the number of ones we know (most of which will be insects).
There are no insects that have two legs. All insects have six legs and most insects have wings on their bodies.
An exoskeleton is an external skeleton that protects and supports the animal's body. Two phyla that have exoskeletons are Arthropoda and Heterokontophyta.
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Insects have six legs, three body segments, and usually wings, while spiders have eight legs and two body segments. In terms of behavior, insects typically have a more diverse diet and are more social, while spiders are solitary predators that primarily feed on other insects.
All Romans citizens could vote. The Roman social orders were: patricians, equites and plebeians.
simple... there are two orders: the natural order and the inverted order.
Two types are the Venus Flytrap (Dionaea muscipula) and the Sundews (Droseraceae - several species).The Venus flytrap have leaves that slam shut and trap any fly or insects that touches a trigger hair.The Sundew traps flies and insects using blobs of very sticky secretion on the leaves.There are also pitcher plants that trap insects in tube like leaves that contain a liquid in the bottom. Insects entering the pitcher slip down and drown and their nutrients are absorbed by the plants
Two
a lot of insects carry diseases
There were three, not two, social orders in Rome. The patricians were the land-owning aristocracy. The equites (cavalrymen) were a wealthy entrepreneurial group (bankers, moneylenders, merchants and investors in shipping and mining) whose equite status was like a lower tier of the aristocracy. The plebeians or plebs were the commoners.
Two.