Featured snippet from the web:
Photosynthesis is the process by which light energy is converted to chemical energy whereby carbon dioxide and water are converted into organic molecules. The process occurs in almost all algae
Monera, Protista, Fungus, Plantae, Animalia. That list goes from simplest to most complex. <span>Every living creature on Earth belongs to one of these five kingdoms. </span>
The lac operon is a negatively controlled inducible operon, where the inducer molecule is allolactose. See attached pic and other diagrams of the operon they really help:)
1. Since they have specialised cells, they are able to carry out different functions. Not every cell has to carry out every metabolic function in a multicellular organism
2. specialized cells are the centerpiece of why organism are able to survive and adapt to their environment. without specialty cells, there would be no muscle tissue or brain material .
The Circulatory System is about the Blood and the heart: they deliver oxygen to the rest of the body (except lungs). AFTER they deliver the oxygen they get the waste (Carbon Dioxide) and deliver it to the LUNGs (Respiratory System)
The Respiratory system is about the Lungs, Bronchi, Alveoli, Trachea, etc. They EXCHANGE the carbon dioxide from the blood with oxygen, they do this in the ALVEOLI (a small, grape-like sockets in the lungs).
The Digestive System consist the Esophagus, Stomach, Intestines, Gallbladder, and Anus. They Digest the food, they ABSORB the nutrients from the food we eat and we poop out the UNNECESSARY wastes.