Yes an organ can belong to more than one system because the organ system is the digestive system.
La Niña has the opposite effect than does an El Niño event. La Niña is a climate pattern that describes the cooling of surface ocean waters. It is considered to be the counterpart to El Nino, which is characterized by unusually warm ocean temperatures in the equatorial region of the Pacific Ocean.
“Cultured” or in vitro meat is animal muscle tissue produced in a laboratory by using in vitro tissue engineering methods. It was produced by scientists who used stem cells harvested from a cow and grew thousands of muscle fiber strands packed together.
The advantages of such synthesized meat can be huge including environmental and health benefits. For example, this is a way to create forms of meat that are healthier, because of the ability to change the components of the meat, e.g. removing or adding fats. This form of meat production also provides higher control over the presence of food borne pathogens commonly found in meat.
C) DNA is made of 4 types of nucleotides
Not all organisms have 46 chromosomes (23 homologous pairs). Not all organisms have nuclei (e.g. bacteria do not have nucleus)
