A. into a climax community; species replaces another
B. and replaces another; ecosystem becomes stable
C. on unoccupied ground; biological community replaces another
D. and then fails; niche changes
E. intraspecific competition; experiences interspecific competition
Answer:
C. on unoccupied ground; biological community replaces another
Explanation:
Primary succession is a gradual change that occurs on bare rocks or areas that have no life existing on it before. It could take several years to be colonized by living things.
On the other hand, secondary succession are changes that occur when one biological community replaces another as a result of factors such as wild fires, or take place in abandoned farm land. New species of organisms take over the area that has life existing on it already. Secondary succession occurs on areas or land that has been colonized initially before.
Answer:
A
Explanation:
The correct answer would be that <u>the availability of food resources for black mice and brown mice will decrease.</u>
<em>Since the food requirements of the black mice are the same as that of the invasive brown mice, the available food supply that used to be only for the black mice would now be shared by the two strains of mice. Hence, the available food for the two groups of mice will naturally decrease.</em>
There is no sufficient information to conclude that the population of tan mice will decrease, hence, option B is incorrect.
The black mice and tan mice have different food requirements going by the information available in the illustration, hence, both cannot compete for food resources. Option C is, therefore, incorrect. In the same vein, option D is incorrect because the tan mice have different food requirements from the brown mice.
<u>The only correct option is A.</u>
Answer:
The Caenorhabditis elegans dauer state is a hibernation-like state of diapause that displays a dramatic reduction in spontaneous locomotion.
Explanation:
Mutations affecting the neurotransmitter dopamine, which regulates voluntary movement in many organisms, can stimulate movement in dauers. The movement of quiescent animals is stimulated by conditions that reduce dopamine signaling and also by conditions predicted to increase dopamine signaling.The stimulation of movement by increased dopamine is much more pronounced in quiescent daf-2(−) dauer and dauer-like adult animals.
In C. elegans hermaphrodites, dopamine is produced by eight neurons and signals via at least four dopamine receptors, DOP-1 through DOP-4. In addition, a presynaptic reuptake transporter, DAT-1, removes dopamine from the extracellular space to terminate signaling. In C. elegans, dopamine is best known for mediating the “basal slowing response” in which the animal's movement slows when it encounters food.. Dopamine is thought to be released in response to food and to act on motor neurons to modulate the animal's movement . Animals that cannot produce dopamine fail to slow in response to food and exogenous dopamine slows the movement of animals cultured without food.The response to dopamine in this situation is complex, as the absence of specific dopamine receptors can have either positive or negative effects on movement.
In patient-centered care, all healthcare decisions and quality measurements are driven by the individual's specific health needs and desired health outcomes. The patient is always a partner to the health care provider, thus following these eight principles. (1)respects for patient's values, preference and expressed needs; (2)coordination and integration of care; (3) information and education; (4)physical comfort; (5) emotional support and alleviation of fear and anxiety; (6) involvement of family and friends; (7)continuity and transition; and (8)access to care. Mrs Zahari is considered to receive effective, safe and patient-centered care if she is treated not only on the clinical perspective but also on the emotional, mental, social, spiritual and financial perspective and the health care provider follows the eight principles of patient-centered care.
