Which of the following is a trace element? MCQ with Answer and Explanation

Explanation:
Primary productivity is the rate at which autotrophs (producers) convert solar energy into chemical energy (biomass) through photosynthesis. Secondary productivity is the rate at which heterotrophs (consumers) assimilate food to create new organic matter (biomass). Decomposition is a biological process carried out by microbes, and its rate is highly dependent on environmental factors like temperature, moisture, and oxygen availability; warmer temperatures generally increase decomposition. Thus, statements 1 and 2 are correct.

Explanation:
Transgenic organisms carry a foreign gene (transgene) deliberately inserted into their genome using recombinant DNA technology. Example: transgenic mice with human genes for disease modeling. GMO is broader, but transgenic specifically involves genes from different species. Cloning copies genome, cross-breeding is within species.

Explanation:
Aqueous humor is a clear fluid in the anterior and posterior chambers of the eye, providing nutrients and maintaining intraocular pressure. Vitreous humor is the gel in the posterior segment.