Somatic genome mosaicism is best described as ________
A) differences in genome sequence between cells of an organism due to errors in sequencing
B) differences in proteins expressed between cells of an organism
C) differences in gen location in the genome
D) differences in genome sequence between cells of an organism due to errors incurred during division
Answer: D
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Points of adhesion between adjacent cells characterized by cadherins interacting with intermediate filaments are referred to as ____
Fill in the blank with the appropriate word.
The human b-globin gene has two alleles, HS and HA, individuals that are homozygous for HS have sickle-cell anemia and a lower fitness. Individuals that are heterozygotes (HSHA) do not show sickle-cell symptoms and have a resistance to malaria. Individuals that are homozygous for HA have the highest fitness but are susceptible to malaria. In areas where malaria is prevalent the HS allele is maintained in the population. Which type of selection is occurring with the b-globin gene?
A. stabilizing B. directional C. disruptive D. balanced E. negative frequency dependent
Many rural communities object to nearby wilderness designations because they
A. depend on natural resources in the area. B. dislike and misunderstand wildlife. C. object to subsidies for wildlife. D. dislike having wilderness nearby. E. object to all of the campers and hikers who visit the area.
Which of the following best describes a biome?
A) three different classes of ecosystems based on high, medium, or low rainfall B) three different classes of ecosystems based high, medium, or low temperature C) small terrestrial regions with similar climate and the similar communities of organisms D) large terrestrial regions with similar climate and similar types of plant life