A substance that provokes an immune response is called an

Explanation:

Antigen, called an immunogen, is a substance that provokes an adaptive immune response on its own if injected into the body. It must combine with products of the immune system (antibodies) in order for an immune response to be made.

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.