Consider an advantageous allele segregating in a population as a major polymorphism. which of the following would not generally slow the fixation of the allele?
a. the environment changes in such a manner as to reduce the selective advantage.
b. the population begins to receive immigrants from a population that maintains the same initial frequency of the alleles.
c. in addition to being advantageous the allele also exhibits overdominance.
d. the population begins to exhibit positive assortative mating for each of the genotypes.
e. the population size increases.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root

In which area of the neuron is an action potential initially generated?