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.
Typical costs: 1  An ultrasound performed by a licensed medical professional - either a physician or a registered medical diagnostic sonographer - usually costs around $200 according to Parenting Magazine. Medical insurance generally covers the cost of an ultrasound if it is deemed medically necessary. If an expectant mother gets an ultrasound only to see the baby or to find out its sex, the insurance company may not pay for the procedure. The cost of an ultrasound varies by insurance plan.