Answer:
B.
Explanation:
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I think the correct answer among the choices listed above is option B. For photoperiodism to occur, a plant must use a phytochrome. This is a pigment that plants use to detect light. It is sensitive to light in the red region. Hope this answers the question.
Answer: A group of scientists wants to determine whether a relationship exists between alcohol consumption and certain types of cancer. To this end, scientists provide study participants with a questionnaire asking them how many alcoholic drinks they have per week and what diseases they have (if any). These scientists provide subjects with a similar questionnaire annually (for a decade). These scientists are performing an ASSOCIATION STUDY.
Explanation: Association study is observational study in different individuals to see if a particular behavioral pattern (such as alcohol consumption) can be associated with certain type of disease (such as cancer).
Information collected from the questionnaires distributed will be subjected to statistical analysis and conclusion(s) will be made.
Answer:
The annual precipitation varies most in tropical rain forest ecosystem.
Explanation:
Tropical rain forest is one of the most extensive selvatic ecosystems, with a very dense vegetation, which is characterized by its high temperatures and abundant and varied annual precipitations, which are between 1500 and 5000 mm per year.
This ecosystem can be found in Central America, Mexico, Australia and even in Asia, where a seasonal climate can be seen divided into rainy seasons -which register the highest rainfall- and a dry season, where rainfall is lower. Most of the year the climate is hot and one of its characteristics is to present the greatest variety of animal and vegetable species.
Tropical rain forest brainly.com/question/11214203
