I believe the answer is the nucleus
Answer:
It is known that observation is an initial part of the steps of the scientific method, considered as the most historical method of data collection and justified by the great evolution that the observational method has experienced in recent years.
That observation cannot be considered part of the scientific method, it is convenient to distinguish ordinary observation and scientific observation, ordinary observation corresponds to a brief mental reading that could be more projection than a real observation, being casual perceptions or occasional, without direction to hypotheses and without intentionality of seeking relationship between variables. Instead, scientific observation is one that gives rise to the problem, hypothesis, variables and others in a scientific investigation.
Likewise, the main objective of the real observation is the verification of the observed phenomenon, with the need to anticipate the error that could alter its perception. Being then, the real observation, the set formed by the perception and the interpretation, for this a good sensory integrity (senses) must be specified for a correct or real observation.
Answer:
The digestion starts with the buccal cavity or mouth by chewing the food. Teeth break the ham and cheese sandwich into small and digest the starch present in the food with help of the amylase enzyme present in saliva. The small chewed particles of food mixed with saliva called bolus move to the stomach.
In the stomach, there is HCl acid present that killed any harmful microorganism present in the bolus and digests the protein present in the ham and sandwich by pepsin enzyme secreted by the parietal cells of the stomach.
Lipase digest fat present in the cheese of sandwich by gastric juice. Small intestine digest fat by lipase protein by protease and carbs by amylase.
Absorption takes place in the small intestine that contain numerous villi’s projections in the cell lining for absorption in the small intestine.
Answer:
Humans—and other complex multicellular organisms—have systems of organs that work together, carrying out processes that keep us alive.
The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems.
The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
The survival of the organism depends on the integrated activity of all the organ systems, often coordinated by the endocrine and nervous systems.
Explanation:
Fact: <span>Organisms are classified based on their physical characteristics. For example, some organisms have a backbone, and other organisms do not have a backbone. Some organisms are single-celled, and other organisms are multi-celled. The classification order that scientists use is Domain, Kingdom, Phylum, Class, Order, Family,Genus, and Species.
</span>Evidence: Je<span>llyfish and corals cannot be called zoophytes, meaning animal-plant. They are neither animal nor plant but have characteristics of both groups.</span>