Your teacher likes to copy. Found this at https://examples.yourdictionary.com/examples-of-keystone-species.html
Grizzly bears: As predators, bears keep down the numbers of several species, like moose and elk. They also carry and deposit seeds throughout the ecosystem. Bears that eat salmon will leave their dropping and the partially eaten remains that provide nutrients such as sulfur, nitrogen and carbon to the soil.
<span>No. Because the hawk and owl hunt similar prey but occupy different ecological niches.</span>
![work \: done \: = \: force \times distance](https://tex.z-dn.net/?f=work%20%5C%3A%20done%20%5C%3A%20%20%3D%20%20%5C%3A%20force%20%20%5Ctimes%20distance)
Work done = 100J
Distance = 5 meters
Force = ?
![force = \frac{work \: done}{distance}](https://tex.z-dn.net/?f=force%20%3D%20%20%5Cfrac%7Bwork%20%5C%3A%20done%7D%7Bdistance%7D%20)
Force = 100/5 = 20N
Therefore, the force needed is 20 Newtons
The study of onion root tips is widely known for the clear appearance of the stages of mitosis since the chromosomes are large and are clearly visible. They are easily stained with the stainer and are visible clearly under the electron microscope. The phase of mitosis are
Interphase
Prophase
Metaphase
Anaphase
Telophase and
Cytokinesis
Each of these phases show the different stages in which the division of one cell into two daughter cells takes place. The cytokinesis is the final phase in the mitosis cell division. This is the part of cell division process during which the cytoplasm of the cell divides into two equal parts and forms into two daughter cells.
During the cytokinesis process, the spindle apparatus partitions and transports the duplicated chromatids and moves into the cytoplasm of the dividing daughter cells. In this process a dividing structure called the cell plate is formed to distinguish the daughter cells. This cell plate later grows into a double layered cell wall which then splits the parent cell into two separate cells.
Hence the option D is the right answer