166. House fly feed on sugar crystal by

1. 1. Crushing it and sucking the powder

   
   
   

   2. Crushing and eating

   
   
   

   3. Sucking

   
   
   

   4. Dissolving its saliva and sponging the solution

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

---

167. Which one of the following statements is not correct

1. 1. All echinoderms are viviparous

   
   
   

   2. Roundworm has no circulatory system

   
   
   

   3. In boney fishes, swim bladder is usually present

   
   
   

   4. In cartilaginous fishes, fertilization is internal

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

---

---

168. Which one of the following statements is not correct?

1. 1. In the animal of phylum poriferates, called sponges, the reproduction is only a sexual by budding

   
   
   

   2. many forms of coelenterates posses a hard exoskeleton of lime to form corals

   
   
   

   3. Animals of phylum Annelida occur in moist soil, fresh water and sea

   
   
   

   4. In the animals of phylum Echinodermata body surface is covered allover by calcareous spines

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---

169. Wall lizard creep over the vertical wall and ceiling with the help of

1. 1. Sucker found in mouth

   
   
   

   2. Claw present on their digits

   
   
   

   3. Adeshive pad found on their digits

   
   
   

   4. Ventral side of body is adeshive

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: C

   N/A

---

---

170. Earthworm is called farmer's friend because

1. 1. It fix atmospheric nitrogen

   
   
   

   2. It make the soil porous

   
   
   

   3. It work as insecticide

   
   
   

   4. It act as fungicide

   
   
   

---

1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: B

   N/A

---