It's Gametes Sexual reproduction is the union of male and female gametes to form a fertilized egg, or zygote. The resulting offspring inherit one half of their traits from each parent.
The Law of Superposition.
The Law of Superposition states that each layer is younger than the one beneath it.
Dna contains sulfur and little phosphorus
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities
TDS, Total dissolved solids (TDS) is measured as a volume of water with the unit milligrams per liter