Ferns are included in_____.

1. 1. Psilopsida
   2. Pteropsida
   3. Lycopsida
   4. Sphenopsida

Who first separated bacteria from other protists as a group_____.

1. 1. John Hogg
   2. Herbert Copeland
   3. Ernst Haeckel
   4. Margulis and Schwartz

Snails belong to_____.

1. 1. bivalves
   2. gastropods
   3. arthropods
   4. platyhelminthes

Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called_____.

1. 1. Facilitated diffusion
   2. Diffusion
   3. Passive transport
   4. Active transport

All of the following coelenterates show alternation of generation except _____.

1. 1. Obelia
   2. Hydra
   3. Aurelia
   4. None of these

The greatest diversity of animals in the lake is found in which one of the following zones?

1. 1. Littoral zone
   2. Limnetic zone
   3. Profundal zone
   4. None of these

Among the followings which is the most longest supportive cell?

1. 1. Sclereids
   2. Trachea
   3. Tracheids
   4. Collenchyma cells

A condition in which there is a decrease of oxygen to the tissue despite adequate blood flow to the tissue is_____.

1. 1. Hypoxia
   2. Aphasia
   3. Dysphasia
   4. None of these

Which of the following is not present in mitochondria?

1. 1. Enzymes
   2. Thylakoids
   3. Co-enzymes
   4. Ribosomes

Cell wall is extremely well preserved in fossil specimens in_____.

1. 1. Dinoflagellates
   2. Slime moulds
   3. Diatoms
   4. None of these