Farmer Fran sprays her sugarcane field with a highly effective pesticide called 'Bayou Bug Blast'. For five years the pesticide
works without a hitch, effectively killing almost all of the bayou weevils trying to eat Farmer Fran's crop. However, during the 6th year, some of the crop takes a hit. During the 7th year, she loses half of her crop, and during the 8th year, she loses almost the entire cane field to bayou weevils, despite using twice the usual dose of Bayou Bug Blast. What happened? A)
The sugar cane became used to the pesticide, rendering it ineffective.
B)
Bayou weevils over-populated, because Bayou Bug Blast killed all of the predatory insects.
C)
A small population of weevils survived on other food sources and returned to the sugar cane field to feed.
D)
The weaker weevils were killed, and Farmer Fran accidentally caused only pesticide-resistant beetles to survive.
<span>The situation is one similar to the development of antibiotic resistance. The initial five years of spraying wiped out most of the pests; however, the killing also helped the pesticide-resistant pests to survive and thrive since they had less competition. Over the period of five years, the pesticide resistance became more and more common among the beetles and in the eighth year, almost all of the beetles were resistant to the pesticide. Thus, the answer is D.</span>
They are called the building blocks of an organism because all living things are made up of billions of cells that can reproduce, build and change that's why it is called the building blocks of all living things.
Answer: Animals undergoing examination should be restrained with just enough force to calm them and keep them still so that the veterinarian can provide proper veterinary care. Each animal's restraint needs will be different and dependent on their behaviors and anatomies.
The Earth is tilted 23.5 degrees on its vertical axis. During the northern hemisphere's spring and summer, the northern hemisphere is tilted towards the Sun.
A lit candle needs to draw oxygen from the air in order to continue burning. If you limit the amount of air available, the candle's flame eventually goes out once it uses up all the oxygen. Lit candles in smaller jar stop burning first because the oxygen trapped in the jar are fewer than the ones in bigger jars.
