Do sponges have tissue and organs?

Under changing environment sudden development of new tissues and organs occurs in living organisms.

Which of the following is most simple tissue in organs and primitive tissue present in all parts of plant

Funaria What do these plants have instead of roots?

Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues / organs by the patient. Which types of immune response is responsible for such rejections?

Define the term tissue and explain the concept of tissue culture.

How is circulation done in sponges and coelenterates?

Which technical term is used to describe the process wherein animal organs and tissues are used for human transplants?

Tapeworm : Tissue -Organ grade organization :: Crab : ______.

The body of sponges does not possess tissue level of organisation though it is made of thousands of cells. Comment.

Which technique in relation to tissues have you studied in earlier classes?