Answer:
The role of carbon in biological systems is to allow the formation of organic molecules, in addition to providing energy for living beings.
Explanation:
Carbon is the fourth most abundant element on earth and one of the main elements of the viological systems, and its presence is essential for life on the planet to be maintained.
Carbon is necessary for all living beings, without exception. This is because it is used in the construction of organic molecules without which no living thing can survive, in addition to providing energy when it participates in sugar molecules, such as carbohydrates.
Answer:
Explanation:Twenty fruit flies are placed in each of four glass tubes. The tubes are sealed. Tubes I and II are partially covered with black paper; Tubes III and IV are not covered. The tubes are placed as shown. Then they are exposed to blue light for five minutes. The number of flies in the uncovered part of each tube is shown in the drawing.
These data show that these flies respond to (respond means move to or away from):
<span>Answer:
Parabiosis is an effective way to evaluate hormone function because it permits the exchange of only long-lived molecules (such as hormones) between the two joined individuals. Thus, the glucose levels of each mouse will stay the same, but the hormone levels will not. The db mutant's hormone level will decrease, and the wild type's hormone level will increase.
Coleman's goal was to determine if the ob and db genes function in the hormonal regulation of appetite and body fat. In this experiment, if both appetite-suppressing hormone and glucose were exchanged, it would be impossible to determine whether any weight changes in the mice were caused by the transfer of hormone or the transfer of glucose from one mouse to the other. For example, an increase in hormone level (and thus greater appetite suppression) could lead to weight loss, as could a decrease in glucose level. On the other hand, a decrease in hormone level or an increase in glucose level could lead to weight gain.</span>
Answer:
It will die.
Explanation:
Fish need functional gills to live.
Answer:
of diffusion
Explanation:
Molecules move down a concentration gradient without the need to use energy. This means they move from a high concentration to a low concentration. This occurs across a semi-permeable membrane, like the cell membrane, by simple diffusion.