A control group is a group that does studies or Experiments that does not receive treatment by researchers and is then used as a benchmark to measure how the other tested subjects do. Ex: Experimenting Arizonas and water together.
Answer:
Darwin's theory of natural selection lacked the physical proof of the intermittent species as suggested by him. The fossils of such species had not been discovered by the time he wrote his book 'Origin of species'. In order to defend his theory, he pointed out the non-reliability on fossils.
Explanation:
The field of geology was just evolving at the time Darwin wrote his book, and no fossils supporting his theory has been discovered yet. He defended his theory by saying that the fossils cannot be depended on for the proof of evolution as the the process of fossilization depends on many factors, and the available fossils are very rare. The irregularities in the geological records, also suggested that the fossil records are not perfect.
Defending his theory, he shows how, if available. the fossil records can support his theory. The fossils should show the features of both the extinct (parent species ) species and the present species, as the species present in today's world have evolved from the ones that existed long before them through the process of natural selection.
The discovery of the Archaeopteryx in 1861 supported his theory and the process of evolution as it showed the features of both the reptiles and birds.
1. respiratory system
sorry i’m not sure about the second one !
Staphylococcus aureus is almost a household name because it is so common and it has plenty of ways to cause infection in humans. The ‘staph’ is the primary cause of boils, folliculitis, impetigo, cellulitis, organ infection and sepsis, bone infections, bacteremia, and biofilms. When ingested and it reaches the intestine, the ‘staph’ has another nasty trick on its sleeve by producing enteroxins A and B, which cause food poisoning. Staphylococcus aureus can get into food when an ill person cough, sneezes, or spits into food. It takes one to six hours for the bacteria to produce toxins, which can make you sick for several minutes to three days.
Answer:
Answer is glycolysis.
Explanation:
The breaking down of sugar or glucose to pyruvic acid through enzymes to release energy is known as glycolysis.
The end product of glycolysis, that is, the pyruvic acid or pyruvate is useful in anaerobic and aerobic respiration.
