Biology Past Questions and Answers

At what stage in the life history of a toad is its mode of breathing similar to that of fish?

In lower plants like mosses, the structure which performs the functions of roots of higher plants is called

In an angiosperm leaf, the xylem is

A group of similar cells performing the same function is

Which of the following is common to a dicotyledonous stem and monocotyledonous root?