What speciality do the legs/appendages of animals belonging to phylum Arthropoda have ?

Mention any four features present in animals belonging to phylum Porifera.

What property do all elements in the same column of the periodic Table as boron have in common?

What property do all elements in the same column of the periodic Table as fluorine have in common?

Given below are the pairs of animals and phylum which they belong to. Which out of these is not a matching pair and why? Taenia (Tapeworm) - Platyhelminthes Pheretima (Earthworm) - Annelida Asterias (Starfish) - Mollusca Adamsia (Sea anemone) - Coelenterate

What are the following and where do you find them in animal body : Axons

What are the following and where do you find them in animal body :Ciliated epithelium

What do you mean by photo electric effect? Calculate the energy of one mole of photons of radiations having wave length 200 nm.

Name the phylum where animals have haemoglobin dissolved in the plasma.

What are the following and where do you find them in animal body : Chondriocytes

Name the phylum to which sea-walnuts belong. What other common name is also given to them?