Answer:
If the person has another meal after 5 pm, the glucose level in the blood will increase, and the insulin level too.
Several hours after the meal, the glucose levels will decrease, and the glucagon levels will increase.
Explanation:
When a person ingests another meal after 5 p.m, the glucose levels in the blood will increase, as the body does not need all that glucose right now the insulin levels in the blood will increase to store glucose for later. The glucagon levels after a meal are very low because the aim is to store glucose not use it.
Several hours after the meal, the body needs the energy to keep operating so it will use the glucose that was stored, to do this, the levels of glucagon in blood have to increase and release the glucose, and the levels of insulin in blood have to decrease.
Answer:
B. In the real world, random and unpredictable events occur, so the Lotka-Volterra parameters vary over time
Explanation:
Lotka-Volterra equations are mathematical models that explain biological prey-predator interactions among two species, considering the following assumptions,
-
The ecosystem is isolated and closed. There is no migration.
- The whole individuals are reproductively equivalent.
- In the absence of the predator, prey shows an exponential growth rate. The prey is in the ideal environment.
- In the absence of the prey, the predator population decreases exponentially. The predator environment is also ideal, but it is limited by the prey density.
- The predation rate is proportional to the encounters rate, which also depends on density.
- The predators affect the prey populations, making it decrease proportionally to the number of prey and predators present.
- The prey population also influence the predator population, proportionally to the number of encounters between the two species.
In these equations, the variable D is the number of predators, and P the number of preys.
The parameters are always constant:
- a1: predator hunting success.
- r2: predator growth rate.
- a2: the success of the predator in hunting and feeding.
In nature, there are many factors affecting interactions. Dense-dependent factors and dense-independent factors. Also in reality there are stochastic factors. <em>Stochasticity refers to the variability in the system involving those factors that are affecting or influencing the population growth. Stochasticity might be related to good years and bad years for population growth.</em>
In a real situation, the compliance of the whole assumptions does not occur. The previously mentioned constants might vary, changing continuously the interaction among the predator and the prey. These parameters change in different degrees, resulting in different circumstances for both species.
Answer:
The correct answer is - observation.
Explanation:
Scientists like Si-Ling Chi, Aristotle, and Mary Anning developed various scientific processes and made discoveries that shaped the history of the world. such discoveries are discoveries related to silkworms and how to make cloth from their cocoons by Si-Ling Chi, developing the scientific method by Aristotle and Contribution to the field of paleontology greatly by Mary Anning.
All these scientists had a different type of skill and ability and one of the skills they had a strong power of observing the things or phenomenon work and many more other aspects of the scientific process.
Answer:
plant: This Elodea leaf cell exemplifies a typical plant cell. It has a nucleus, and a stiff cell wall which gives the cell its box-like shape. The numerous green chloroplasts allow the cell to make its own food (by photosynthesis).
The central vacuole takes up most of the volume of the cell. It is transparent, but you can see where it's pressing the chloroplasts up against the cell wall, especially at the ends of the cell.
Like animal cells, the cytoplasm of this plant cell is bordered by a cell membrane. The membrane is so thin and transparent that you can't see it, but it is pressed against the inside of the cell wall.
animal :This human cheek cell is a good example of a typical animal cell. It has a prominent nucleus and a flexible cell membrane which gives the cell its irregular, soft-looking shape.
Like most eukaryotic cells, this cell is very large compared to prokaryotic cells. For scale, notice the pair of dark blue bacteria cells sticking to the right edge of the cheek cell. The bacteria are only a fraction of the size of the nucleus, but their tiny size is typical for bacteria.
He is making a plant cell since the cell walls are box shaped, the balloon would be the large vacuole which takes up a lot of space in the cell, the marbles would be the ribosomes.
