Chloroplasts also produce oxygen as a by-product of the process. Oxygen is a waste product for plants, and they expel it through structures called stoma, which are most abundant on the undersides of leaves.Chloroplasts only occur in the cells of plants and protists.
1 A 3d/4d ultrasound can cost anywhere from $100 to $300. 2  This price range depends mostly on how many features you wish to be included in your ultrasound experience.3  The more features you choose and the longer the session, the higher the cost will be. 4  On average, plan on spending anywhere from $100 to $1,000. A 3d/4d ultrasound can cost anywhere from $100 to $300. 2  This price range depends mostly on how many features you wish to be included in your ultrasound experience.
The âsticker priceâ of an ultrasound can vary dramatically, depending on where you live, and whoâs providing the service. Healthcare Bluebook, which estimates fair prices of medical procedures in various parts of the country, suggests that a reasonable cost for a fetal ultrasound is $280. On Manhattanâs tony Upper East Side, Healthcare Bluebookâs suggested fair price for a sonogram is $325. But even in down-and-out Detroit, itâs $281.