The cells present in testes and secrete testosterone are_____.

1. 1. Spermatocyte
   2. Interstitial cells
   3. Sertoli cells
   4. Germinal cell

Ground pries are also known as_____.

1. 1. Spike mosses
   2. Lycopods
   3. A & B 
   4. All of these

The first stage of development in which a cavity appears is the_____.

1. 1. Gastrula
   2. Balastula
   3. Morula
   4. Neurula

Primary structure of proteins determines_____.

1. 1. Bending of polypeptide chains
   2. Number of polypeptide chains involved
   3. Coiling of polypeptide chains
   4. Amino acid sequence

Oxygen contents per liter of air is_____.

1. 1. 100 ml
   2. 200 ml
   3. 300 ml
   4. 400ml

Venus flower basket is also known as_____.

1. 1. Leucoselenia
   2. Sycon
   3. Spongilla
   4. Euplectella

The one which can tolerate highest external osmotic pressure is _____.

1. 1. Fungi
   2. Amoeba
   3. Bacteria
   4. Algae

Microspore of a seed plant that contain male gametophyte including the gamete is called_____.

1. 1. Microgametophyte
   2. Ovule
   3. Pollen grain
   4. Microsporangium

Main blood vessel of arthropods usually_____.

1. 1. Lies on dorsal side
   2. Lies on lateral side
   3. Lies not present
   4. Lies on ventral side

Which of the following is not included in Protostomes?

1. 1. Annelids
   2. Arthropods
   3. Hemichordates
   4. Molluses