Given below are four statements (A to D) each with one or two blanks, select the option which correctly fills up the blanks in the statements : Statements:
A. Use of chemicals or radiation In inducing _______to develop improved varieties of plants is called_______
B. _deals with the Culturing and rearing of freshwater organisms and the production of fishes is called_______
C. An organism or its karyotype having more than two genomes is called_______
D. _______ is a Iarvivorous fishwhich eat larva of mosquito.
Options:

Options

A. A- Mutation, Mutation breeding, B - Pisciculture, Aquaculture, C - Polyploid, D - Gambusia
B. A- Mutation, Mutation breeding, B - Aquaculture, Pisciculture, C - Haploid, D - Gambusia
C. A- Mutation, Mutation breeding, B - Aquaculture, Pisciculture, C - Polyploid, D - Gambusia
D. A - Mutation, Cross breeding, B - Aquaculture, Pisciculture, C - Polyploid, D - Gambusia

Answer

To solve the question, we need to fill in the blanks in each statement with the correct terms related to the concepts in food production and biology. Let's analyze each statement one by one.

### Step-by-Step Solution:

**Statement A:**
- The first blank refers to a process that involves inducing changes in the genetic material of plants. The correct term here is "mutation."
- The second blank describes the method used to induce these changes. The correct term is "mutation breeding."
- **Filled Statement:** Use of chemicals or radiation in inducing **mutation** to develop improved varieties of plants is called **mutation breeding**.

**Statement B:**
- The first blank refers to the field that deals with the cultivation of aquatic organisms. The correct term is "aquaculture."
- **Filled Statement:** Aquaculture deals with the culturing and rearing of freshwater organisms and the production of fishes is called **aquaculture**.

**Statement C:**
- The blank refers to an organism that has more than two complete sets of chromosomes. The correct term is "polyploid."
- **Filled Statement:** An organism or its karyotype having more than two genomes is called **polyploid**.

**Statement D:**
- The blank refers to a specific type of fish known for eating mosquito larvae. The correct term is "Gambusia."
- **Filled Statement:** **Gambusia** is a larvivorous fish which eats the larvae of mosquitoes.

### Final Filled Statements:
- A. Use of chemicals or radiation in inducing **mutation** to develop improved varieties of plants is called **mutation breeding**.
- B. **Aquaculture** deals with the culturing and rearing of freshwater organisms and the production of fishes is called **aquaculture**.
- C. An organism or its karyotype having more than two genomes is called **polyploid**.
- D. **Gambusia** is a larvivorous fish which eats the larvae of mosquitoes.