I not sure but i think it is 4
Answer: the development of the enzyme Rubisco and evolution of oxygenic photosynthesis.
Explanation: One can pick many key steps in early evolution: the development of the first cells, oxygenic photosynthesis, endosymbiosis leading to eukaryote organisms.
One important step was the mutation to the enzyme ribulose bisphospate carboxylase oxygenase (Rubisco) which enabled oxygenic photosynthesis.
The cyanobacteria that had Rubisco changed the planet’s atmosphere by producing oxygen as a by-product of photosynthesis. They were the most successful organisms of the time and have continued as a successful and ubiquitous group of organisms for billions of years.
The production of oxygen changed the direction of evolution profoundly. Later endosymbiosis led to the evolution of plants, with cyanobacteria the ancestors of chloroplasts, making Rubisco one of the most common enzymes on the planet.
A potometer can be used to measure the rate of transpiration that's proportional to water uptake. Transpiration cannot be measured directly as some of the water will be used in photosynthesis.
Answer:
Sand
Explanation:
A well should be placed so that contamination from any source moves away from the well and not toward it.
Type 2 diabetes—also known as adult-onset or non–insulin-dependent diabetes—is a chronic and progressive condition that affects the way your body controls the amount of sugar (glucose) in the blood.
