Answer:
Controlling purple loosestrife can be an exhausting and expensive process that may have limited success. Thus, the use of a biological control agent has been a handy tool to reduce the effort needed to considerably reduce the threat of purple loosestrife to our wetlands. Biological controls are animals, bacteria, fungus or viruses that are released into an infestation of an invasive species to consume or infect and kill the invasive species.
Biological controls must be thoroughly and extensively researched to ensure there are no secondary effects of the control, such as another species being killed by the control. Biological controls do not usually eradicate an invasive species, but they provide a level of control that can significantly reduce the species presence, making it either inconsequential or easier to control via other methods.
This blog will explore biological control, invasive species issues, and provide a step-by-step guide to how to responsibly raise and release Galerucella beetles for the control of purple loosestrife.
Sources:
PCA Alien Plant Working Group Invasive Species Profile
Purple Loosestrife (Lythrum salicaria)
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Answer:
In addition to Egypt, the Nile runs through or along the border of 10 other African countries, namely, Burundi, Tanzania, Rwanda, the Democratic Republic of the Congo, Kenya, Uganda, Sudan, Ethiopia, and South Sudan. Its three main tributaries are the White Nile, the Blue Nile, and the Atbara.
Answer:
Set A
Explanation:
If you plot the values (x,y) (or just imagine plotting them) - in Set A you will get a line that is going down as x goes up. This is a negative linear association. For set B the line will go up - positive linear association. For set C it will go down but it will not be a straight line - with each increase of x by 1, the y will be dropping by 2, 1, 1, 0.5, 0.5, 0.5, ...0 - clearly not the same step. Set D - y is increasing as x goes up (so not negative association) and wont form a straight line either.
A, True , this answer is true because they were planning to attack , because of the colonists
