Which of the following classes includes the only type of echinoderm that has a calyx on a stalk? Echinoidea Holothuroidea Ophiuroidea Asteroidea Crinoidea

Create the Taxonomic Key below using the following arthropods  Periplaneta americana  Triatoma sp  Solenopsis sp.   Pediculus humanus capitis  Pulex irritans  Acronicta sp.  Tribolium sp  Musca domestica  Vespa sp.  Aedes aegypti  Latrodectus sp.  Centruroides sp.  Tabanus sp.  Sarcoptes scabiei  Ixodes sp.

Give the different classes of each phylum. Phylum Echinodermata,Phylum Arthropoda and Phylum Chordata

Collembolans Question 1 options:   are arachnids   are members of the Paleoptera   are hexapods   are entognathous   have chitinous exoskeletons The Insecta includes Question 2 options:   centipedes   chewing and sucking lice   more than 500,000 species   all arthropods with wings   less than 500,000 species The insecticidal compound BtK Question 3 options:   is a bacterium or bacterial product   is an acronym of Bacillus thurigiensis var. Kurstaki   is mainly effective against lepidopterans   interferes with normal action of the tormogen cells   crosses peritrophic membrane of midgut and binds receptors.