BIOL 211 Study Guide - Quiz Guide: Thrinaxodon, Claytonia Virginica, Aureus
15 Apr 2018
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Chapter 22 review questions round 1: resistance to a wide variety of insecticides, fungicides, antibiotics, antiviral drugs, and herbicides has recently evolved in hundreds of insects, fungi, bacteria, viruses, and plants. The sickle-cell allele is pleiotropic (that is, it affects more than one phenotypic trait). Specifically, this allele affects oxygen delivery to tissues and affects one"s susceptibility to malaria. Heterozygous individuals who have one normal and one sickle-cell allele have a phenotype that has both costs and benefits. The cost: under conditions of low atmospheric oxygen availability, individuals heterozygous for this allele can experience life-threatening sickle-cell. The benefit: such individuals are less susceptible to malaria. ________: non-adaptive traits, a group of boys work out and practice for long hours and as a result they become very good at playing basketball. What does this mean: this means that in more recent species, individuals without the trait had higher fitness, a farmer uses triazine herbicide to control pigweed in his field.
