First, all plants undergo an alternation of generations, between a haploid gametophyte stage and a diploid sporophyte stage. In the most primitive plants, like mosses, the gametophyte is dominant (i.e. it's big and green). In higher plants like ferns and fern allies, the sporophyte stage is dominant.s we pass from mosses to ferns, we see a gradual transition from primitive to modern traits. There are two major trends you should focus on in today's lab. The first is a transition in life cycles, the second is a change in basic internal structure.
Diamond Pricing: 1 carat diamonds are an affordable option for many. The price range for 1 carat diamonds is between $3,080 and $26,950 per carat. Round Brilliant Cut stones have a 6.5mm diameter. 1 carat diamonds are often sold because they make for great shoulder stones.
These seeds are small and uniform in weight; therefore, they were a standard for weighing gemstones in early times. Around 1920, the metric carat was adopted as an international standard. One carat equals a fifth of a gram (0.20 grams), so there are five carats to the gram. Tavernier's Law. Generally, as a gemstone's carat weight increases, so does the price per carat. The following shows how the price of a diamond might increase with this formula applied to a $1000 a carat base price.