In response to larval insect grazing, some plants produce substances known as precocenes, which destroy the part of the insect brain that secretes juvenile hormone. What effect would exposure to precocenes have on insect development?
A. The larval insect would molt into an adult
prematurely.
B. The larval insect would not be able to
produce ecdysone.
C. The larval insect would molt into larger and
larger larval stages.
D. The larval insect would not be able to molt.
E. The time interval between successive
molts would increase.
A
You might also like to view...
A drug that disrupts a microbial function not found in animal cells usually has a higher therapeutic index.
Answer the following statement true (T) or false (F)
If a storm breaks off the top of a tree, within a year or two, one of the lower branches will grow upward and become the new tree top, while inhibiting other branches from doing the same. This is an example of
A) the presence of cytokinins. B) the influence of ethylene. C) the formation of an abscission layer. D) phytochrome inhibition. E) apical dominance.
In lakes, the open-water surface layer is called the ____.
A. benthic zone B. abyssal zone C. limnetic zone D. littoral zone E. profundal zone
Which are the primary molecules making up plasma membranes in cells?
A) carbohydrates B) lipids C) proteins D) nucleic acids