Invertebrate Zoology

In phylum Arthropoda, different types of respiratory organs had evolved. In terrestrial arthropods book lungs and trachea developed.In scorpions and spiders, respiration takes place by book lungs.

This is the correct option because wasps, houseflies and beetles all can crawl as well as fly.

A spider catches its prey in its web. Houseflies carry disease-causing germs to our food. Lice and leech suck blood. All these statements are correct.

Ascaris lumbricoides is the scientific name for the human roundworm.

It is a simple, gradual and direct metamorphosis in which immature forms resemble the adult, except in size, and are referred to as nymphs. Grasshoppers have paurometabolic type of metamorphosis.

The sentence requires an indefinite article 'a' before 'hard outer shell' because it is a singular countable noun being introduced for the first time in the list of characteristics.

This is the correct option as bed bugs do not emit light in the darkness.

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Insects respire through a network of tiny tubes called tracheae, which open to the outside through small holes known as spiracles.

Each cocoon of silk worm (Bombyx mori) has about 1000 meter of silk thread. During its short life the female moth lays about three to five hundred whitish eggs. A minute caterpillar larva hatches out from each egg in about 10 days. The larva starts pouring out its sticky saliva through a minute aperture called spinneret located upon the lower lip of its mouth. As it comes out in air the lpuid saliva immediately solidify into a fine silk thread. 

The septal nephridia and pharngeal nephridia dishcarge thier waste products into the lumen of the alimentary canal and not outside. These are knwon as enteronephric types of nephridia. In Pheretima three types of nephridia are present

1.        Septal nephridia
2.        Pharyangeal nephridia
3.        Integumentary nephridia. 

Flame cells are the specialized excretory cells found in the simplest freshwater invertebrates, including flatworms like tapeworms, to remove waste materials.