Answer:
4. Cytoplasm
Explanation:
While maintaining homeostasis, and having a definite function within a cell, the cytoplasm is technically not an "organelle". As you know, the cytoplasm is a dense solution within a cell membrane that holds most of the cell's organelles, right? Despite holding many organelles, it is in itself, not a real organelle since it has no definite position nor place, due to its liquid state.
Answer:
The nervous system together with the endocrine system enables the organism to perceive the variations of the (internal and external) to disseminate modifications that these variations produce and execute the answers appropriate to maintain the internal body balance (homeostasis). The autonomic nervous system divides into the sympathetic nervous system and parasympathetic nervous system. In general, these two systems have opposite (antagonistic) functions, they correct the excesses of the other.
For example, if the sympathetic system speeds up too much the heartbeat, the parasympathetic system kicks in, slowing down the heart rate. If the sympathetic system speeds up stomach work and intestines, the parasympathetic comes into action to reduce the contractions of these organs. The sympathetic generally stimulate actions that mobilize energy, allowing the body to respond to stressful situations. For example, the sympathetic system is responsible for the acceleration of heart rate, by increasing the blood pressure, the concentration of blood sugar and by activating the general metabolism of the body. On the other hand, parasympathetic mainly stimulates relaxing activities, such as reductions in the heart rate pace and blood pressure. One of the main differences between the sympathetic nerves and parasympathetic is that the postganglionic fibers of the two systems usually secrete different hormones.
Founder effect is most likely for a particular human population with a higher incidence of polydactyly (extra fingers/toes) than the human population as a whole.
In population genetics, the basic effect is the loss of genetic variation that occurs when a new population is founded by a very small number of individuals from a larger population. As a result of the loss of genetic variation, the new population may differ significantly, both genotypically and phenotypically, from the parent population from which it originates. In extreme cases, the founder effect is thought to lead to speciation and the subsequent evolution of new species The founder effect is a form of genetic drift. This is a phenomenon in which a new population is derived from a small isolated group of individuals. The new population is genetically different from the parent populations. The founder effect can arise from cultural isolation. For example, the Amish population in the United States exhibits a founder effect because it grew from very few founders, they do not have any newcomers, and tends to marry within the same community.
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False, because the digestive process starts by breaking down food in your mouth...then travels down to your stomach where enzymes and muscle contractions break down food into smaller pieces to pass through the intestines!
The five major histone proteins are H1, H2A, H2B, H3, and H4. Two molecules each of H2A, H2B, H3, and H4 make up<span> the histone octamer, which combines with DNA to form the core </span>nucleosome<span> particle.
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