Match the following scientific terms with their appropriate descriptions:

textbf{Step 1:} ELISA (A) stands for Enzyme-Linked Immunosorbent Assay, a test that detects the presence of an antigen by using an antibody linked to an enzyme. This matches with description IV, where the antibody is linked to an enzyme.
Step 2: RNAi (B) refers to RNA interference, a process that prevents gene expression by silencing specific genes. This corresponds with description III, which talks about gene expression prevention.
Step 3: GEAC (C) stands for Genetic Engineering Approval Committee, an organization that ensures the safety of genetically modified organisms (GMOs). Therefore, it matches with description II, which focuses on the safety of GM organisms.
Step 4: GMO (D) refers to a Genetically Modified Organism, which is an organism with an altered gene.
Hence, this corresponds with description I, which refers to an altered gene.
Conclusion: The correct matching is:
A-IV (ELISA — Antibody linked to enzyme)
B-III (RNAi — Gene expression prevention)
C-II (GEAC — Safety of GM organisms)
D-I (GMO — Altered gene)
Match the following:

Choose the correct pair from the following:

Identify A, B, C plants in a series based on these characters of roots:
A. Roots at lower nodes of stem
B. Roots absorb water and food from host plant
C. Root forming nodules
Study and match the following lists:

Give the ratios between the following compounds in photosynthesis of plants:
A. Tetroses and sedoheptuloses
B. CO2 fixed and net production of G-3-P
C. DHAP takes part in regenerative phase and RUBP formed