Positive feedback is most like adding wood to a burning fire to increase the heat.
Positive feedback is a regenerative feedback process in which a segment of the output is combined with the input for the output to increase more. Components of a positive feedback loop include a stimulus or change, a sensor, a control center and an effector. Examples of positive feedback include the process of labor and childbirth and blood clotting.
B. Metaphase II
C. Mitosis
D. Prophase I
The correct answer is option D. Prophase I
The crossing over is a phenomena, which occur in the cells undergoing meiosis. In the process of crossing over, the exchange of the genetic material takes place between the sister chromatids. This process takes place in the prophase 1 stage of meiosis 1 in the gametes. The exchange of genetic material between chromatids cause recombination, and hence, genetic variation.
Answer:
Pachytene of prophase I of meiosis I
Explanation:
Crossing over is the process of exchange of genetic material between non-sister chromatids of homologous chromosomes. It occurs during the pachytene stage of prophase I of meiosis I. During pachytene, the paired homologous chromosomes exchange genetic material between themselves and add new gene combinations to the daughter cells.
b. Disk soaked in disinfectant 3
c. Disk soaked in disinfectant 2
d. Disk soaked in distilled water