Mario sets up an experiment to determine the source of the oxygen gas produced by photosynthesis. To determine this, he uses an isotope of oxygen called O-18. He labels the O-18 oxygen so he can follow its path through photosynthesis. Plant A is given carbon dioxide that contains the O-18 isotope. Plant B is given water that contains the O-18 isotope. When he examines the oxygen from both plants, only plant B produced O-18 oxygen. This indicates that the source of oxygen is water. The photosynthesis involves the transfer of electrons between the photosystem I and II. The water gets split into oxygen, hydrogen ions and electrons in the photosystem I. The electrons move to the photosystem II where the carbon fixation into sugars takes place. The plant A will have O-18 isotope in its synthesised sugar molecule, which gets stored inside it.
Answer;
The best contraceptive method for sexually active people not in a monogamous relationship is Condoms.
Explanation;
Contraception and fertility control are methods or devices that are used to prevent pregnancy. Contraception methods ,may be classified as; hormonal methods (such as combined hormones), barrier methods (e.g use of condoms), Intrauterine Device use, and Natural methods (such as abstinence). Condoms is a type of barrier methods of contraception that is best for sexually active people that are not in a monogamous relationship.
Answer: 1/4 AA or type A Blood; 1/4 BB or type B Blood; 1/2 AB
The plant species that live in the colder environment have some adaptations that makes them survive in that conditions
These plants have a well developed vascular system due to which they have the ability to trap every inch of sunlight available for the process of photosynthesis.
Some of the plants shed their leaves and stay in dormant conditions.
Evergreen trees have thick waxy coating that prevents the loss of water.
The plants that grow in arctic regions are small and they grow close to the ground in a specific shape that helps them to shed snow from them.
