Question : The release of which of the following into ponds and wells helps in controlling mosquitoes?
Option 1: Snail
Option 2: Crab
Option 3: Dogfish
Option 4: Gambusia fish
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Correct Answer: Gambusia fish
Solution : The correct answer is Gambusia fish.
Gambusia fish or Gambusia affinis is a freshwater fish which is native to North America. It feeds on the larvae of mosquito which helps to control the growing mosquito population. They are larvivorous fish which helps in the biological control of mosquitoes. They are also known as topminnow.
Mosquito acts as a vector for various diseases like Zika virus, West Nile Virus, Chikungunya Virus, Dengue, Malaria etc.
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Question : Which one of the following is not a true fish?
Option 1: sliver fish
Option 2: Saw fish
Option 3: Hammer fish
Option 4: sucker fish
Question : Which one of the following creatures has maximum number of ribs?
Option 1: Crocodile
Option 2: Snake
Option 3: Ray fish
Option 4: Flying fish
Question : Nuts, vegetable oil, and fish are good sources of which of the following?
Option 1: Carbohydrates
Option 2: Minerals
Option 3: Healthy fats
Option 4: Proteins
Option 1: Shark
Option 2: Starfish
Option 3: Eel
Option 4: Seahorse
Question : Which one of the following pairs belongs to cartilaginous fish?
Option 1: Shark and Tuna
Option 2: Shark and Ray
Option 3: Shaktes and Hilsa
Option 4: Ray and Eel
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