Biogenic minerals are minerals produced by living organisms. Two commonly seen biogenic minerals are , which is often produced by coral and other invertebrates, and , which often makes up the shell material of mollusks such as clams.

The preferable words for the fill in the blanks will be -  

Aragonite, calcite

Explanation:

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.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.