Lichen is an association between which of the two ?
1). Algae and fungus
2). Algae and tree
3). Fungus and tree
4). Bacteria and legume plant
1. What is the main purpose of white blood corpuscles?
2. Question 3:What is meant by the term ‘breed’? What are the objectives of animal breeding?
3. Which of the following is a Biological method of soil conservation?
4. Haustoria or sucking roots are found in which of the following?
6. Acacia arabica is the scientific name of
7. The carbon dioxide content in the air that we exhale is about