Answer:
Option (4).
Explanation:
Cell communication involves various junctions like tight junctions and gap junctions. These junctions allows the communication of between cell-cell and cell-extracellular matrix connection.
The diseased animal cells activate the death cascade that may also cause death of the neighbor cells. This occur because the death molecule may pass to the neighbor cells through the gap junctions.
Thus, the correct answer is option (4).
The answer is c.the individual will have an extar chromosome resulting from non-disjunction
The two features are four limbs and lungs. These features were essential for animals to move from aquatic to land.
Lobe-fins are not common among the living fish and are only exhibited by the lungfish and coelacanth. However, the lobe limbs are exhibited by various living species, like humans. This is due to the fact that all the tetrapods, that is, four-limbed vertebrates, share a more recent common ancestor with the lungfish and coelacanth.
Tetrapods evolved from a group of species, which were aquatic and exhibited scales and fleshy fins. However, they also had lungs, which they used to breathe oxygen. About 360 to 390 million years ago, the predecessors of these species started to thrive in shallower waters and finally moved to land.
With this, they experienced natural selection, which assisted various adaptations for a terrestrial way of life. The modern humans still persist the proof of the aquatic past in the manner the arms and legs are attached to the body.
They don't offer justifications for why they are accurate. They are regarded as established facts.
- A theory essentially means the opposite. A well-supported explanation of a phenomenon in the natural world, including laws, hypotheses, and facts, is called a theory.
- A hypothesis is a statement about the natural world that can be verified by observations or tests. Hypotheses must be falsifiable—that is, they must be formulated in a fashion that allows them to be disproven—and be evaluated scientifically in order to be considered to be true.
- Scientific laws or laws of science are propositions that describe or forecast a variety of natural occurrences and are based on repeated tests or observations.
- Scientific rules condense the findings of tests or observations, typically within a specific applicability range. The accuracy of a law typically does not change when a new theory of the relevant phenomenon is developed; rather, the law's application area expands because the mathematics or statement that represents the law remains constant.
Therefore, scientific laws, theory, and hypothesis are different aspects of Science.
Learn more about Scientific laws:
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enteric
Control of the digestive system is also maintained by the enteric nervous system (ENS), which can be thought os as a digestive brain that helps to regulate motility, secreation, and growth. The enteric nervous system can act as fast, internal response to digestive stimuli. When this occurs, it is called a short reflex.