Answer:
a. The corn borer must have or generate (by mutation) heritable variation in resistance to the toxic protein.
b. The resistant corn borers must survive better or reproduce more than nonresistant corn borers.
Explanation:
When there is a change in the surroundings of organisms, some genetic variations become beneficial to the organisms. Natural selection favors the organisms having these genetic variations.
The development of resistance in the corn borer population requires the presence of the gene for the resistance in the population. If there is no gene already present in the population, there should be a mutation to give rise to such gene/s. The corn borers having this gene should be able to survive better in the presence of the toxic protein and should leave more progeny in order to increase the frequency of the gene in the population over the generations.
A eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes. However, unlike prokaryotic cells, eukaryotic cells have: a membrane-bound nucleus. numerous membrane-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)
Protons are positive and 1 atomic mass unit (or AMU), neutrons are neutral and 1 AMU, and electrons are negative and have no real weight.
Friction between tectonic plates, which further lock them, leads to earthquakes.
<u>Explanation:</u>
Tectonic plates move slowly, but at times there is friction between them. This friction locks them, and that leads to difficulty in movement. Whereas, other tectonic plates keep on moving, which leads to high pressure at the locked section.
This lock section tries to resist pressure, and the movement of plates is passed to each other. This rapid movement leads to a tectonic earthquake. The energy released during the change of plates causes the Earth's crust to shake, and that's how we feel shaking.
