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 weevils to survive.

The weaker weevils were killed, and Farmer Fran accidentally caused only pesticide-resistant weevils to survive.

Explanation:

Over the years, pests builds resistant as a result of continuous exposure to a particular pesticides, hence; those with strong immunity were able to pass across the gene to the younger generation and with time they became used to it and makes it less or not effective on them.

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hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest