There are three different types of observation methods for the purpose of research. These three methods include the structured observation, participant observation, and the field experiments.
The structured observation is the method of data collection which is done without the direct involvement of the researcher with the participants. the participant observation is the type of observation which is used in the experiments involving qualitative research. The field experiment is the method of observation when the experiment rules are applied in the real world.
Among the given three types of observations, the structured observation is the type of observation that is used while observing the bacteria once a week for a period of a month.
Hence, the answer is structured observation.
Answer;
C. The body failing to respond to signals that slow the cell cycle
-The body failing to respond to signals that slow the cell cycle: can result in irregularities leading to cancer.
Explanation;
-Cancer is caused by uncontrolled cell division. Its development and progression are usually linked to a series of changes in the activity of cell cycle regulators. For example, inhibitors of the cell cycle keep cells from dividing when conditions are not favorable, therefore, too little activity of these inhibitors can promote cancer.
-Similarly, positive regulators of cell division can lead to cancer if they are too active. In most cases, these changes in activity are due to mutations in the genes that encode cell cycle regulator proteins.
Answer: A
Van Helmont concluded that most of the mass the plant gained had come from water.
Answer:
This type of key is called a "dichotomous" key because the meaning of the word is "two branching". The structure of the key is such that each question is actually like a tree branch that has two smaller branches proceeding from it.
