Answer:
Since sea urchins are picky, they are used as indicator organisms in public aquariums to determine if the system is functioning properly. This is because they are very "picky" about water quality. If the water is contaminated, the sea urchins will be the first to show signs of stress, spines laying down or falling off. Do use an aquarium filter and do clean up the day after feeding. Any metal exposed to the seawater will corrode and poison the tank. A dying sea urchin will often spawn out and rot out, causing the others in the tank to spawn and die as welll.
Explanation:
The correct answer is True.
Further Explanation:
The Big Five personality traits are based around the question "who are you?" it is one of the most difficult answers each person answers about themselves.
The factors that are examined in the the Big Five are listed below;
*Openness to experience
*Neuroticism
*Conscientiousness
*Extroversion
*Agreeableness
Robert McCrae and Paul Costa are the two men who did extensive research on the subject and were the first to validate the model. The research duo have been working together since 1975.
The volcanoes may be dormant or not as active. Only very active volcanoes will be known for erupting a lot.
Answer:
The correct option is B) a pattern of biological functioning that occurs on a 24-hour cycle.
Explanation:
Biological rhythm is defined as the regular variation of an organic function related to the course of time, circadian biological phenomena (around the day), are those with a period of approximately 24 hours.
Circadian rhythms are physical, mental and behavioral changes that follow a daily cycle (the biological rhythm), and that respond primarily to light and darkness in an organism's environment. This cycle close to 24 hours, allows to recognize the sleep-wake phenomena and their homeostatic action, in the systemic processes of every living being. The circadian system is composed of photoreceptors, pacemakers and efferent pathways that allow a regular functioning of the sleep and wakeful state.
