Behavioral cycles that repeat daily are called circadian rhythms.
Circadian rhythms are behavioral, physical and mental changes that occur in living organisms (plants, animals, fungi and cyanobacteria) and follow a 24hours (daily) cycle. Circadian rhythms regulate many physiological processes and they are influenced by external cues such as sunlight and temperature. They determine when to sleep, when to eat or whether an individual feels wide-awake, or feels tired at different times of the day.
b. chlorofluorocarbons
c. nitrates
d. dust particles
Answer:
The correct answer is option c. "nitrates".
Explanation:
Nitrates are among the most common contaminants and contributors of water pollution, particularly in rural areas. The presence of nitrates in drinking water is one serious problem because it could cause methemoglobinemia, or the "blue baby" disease. Additionally, the presence of nitrates in groundwater is related with the presence of other contaminants, such as bacteria or pesticides.
Answer:
IF a high concentration of fertilizer is used, THEN orchid plants will grow best
Explanation:
The hypothesis in an experiment is the testable explanation given in support of an observer problem. It is a predictive statement that aims at proferring a possible solution to a problem or answer a question asked. The hypothesis must be able to be tested via experimentation as this is one important feature all hypotheses must possess. A hypothesis is usually written in an "IF, THEN" format.
In this question, an investigation is being carried out to know the effect of a certain amount of fertilizer on the growth of orchids in a greenhouse. A possible explanation/hypothesis will be:
IF a high concentration of fertilizer is used, THEN orchid plants will grow best.
This can be accepted or rejected depending on the outcome of the experiment.