Which of the following has indeterminate development?     Echinodermata     Nematoda     Arthropoda     Platyhelminthes

Which phylum of animals has a water vascular system connected to tube feet? Chordata Echinodermata Arthropoda Platyhelminthes

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.

Flatworms show bilateral symmetry and some cephalization.   True   False   Some parasitic platyhelminths lost their digestive tract.    True   False   Platyhelminths can remove excess water out of the body.   True   False