<span>Let the equation be : at^2 + bt + c = P,
where t = time (hrs),
P = population (1000's).
When t = 1, P = 3.03.
When t = 2, P = 1.72.
When t = 3, P = 1.17.
Substitute these into the equation to obtain these 3 simultaneous equations :
a + b + c = 3.03
4a + 2b + c = 1.72
9a + 3b = c = 1.17
Solving gives :
a = 0.38,
b = -2.45,
c = 5.1.
The equation is therefore,
P = 0.38t^2 - 2.45t + 5.1
Testing with t = 0 to 6 gives the population values as provided,
so it seems to be a valid model.
At t = 9 hrs,
P = 0.38*9^2 - 2.45*9 + 5.1
= 13.83.</span>
Answer:
The diameter of the xylem vessels should be small in order for the capillary action to take place.
Explanation:
The vessels through which water is transported to different parts of the plants and trees are the xylem. Water is transported in the trees through a mechanism named as capillary action. This mechanism can occur only if the diameter of the vessels are small.
The water molecules adhere to the walls of xylem and an upward force is generated. If the diameter of the vessels i.e xylem would be small then the surface tension between the xylem and water molecules would be enough to move the water in an upward direction.
I think the correct answer from the choices listed above is option D. Competition is the limiting factor to the toucan population since the <span>great hornbill and the toucan both eat the same fruit, insects, and nuts. Also, they compete with their habitat.</span>
Hello!
Cell theory was developed as a result of many scientists' work.
Some of these people are Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. They found out that all plants are made of cells, all animals are made of cells, and all cells are made from the division of other cells (respectively).
On the other hand, Robert Hooke studied cork tissue under the microscope, and he was the one who discovered the cell. Anton van Leeuwenhoek was the first to observe living things using a microscope.
Hope this helps!
The steps are:
1-The phage binds to a bacterial surface.
2-Phage injects viral DNA in host bacterial cell.
3-Host DNA hydrolyses in pieces.
4-Phage DNA is now replicated and new phage coat proteins are synthesized.
5-The bacterial DNA is surrounded by phage coat protein.
6-Host bacterial cell lyses.
7-Bacterial DNA is injected in a bacterium by the phage.
8-Bacterial DNA integrates into the new bacterial host chromosome.
