Imagine that you compare two DNA sequences found in the same location on homologous chromosomes. On one of the homologs, the sequence is AACTACGA. On the other homolog, the sequence is AACTTCGA
Within a population, you discover that each of these sequences is common. These sequences _____.
A) contain an SNP that may be useful for genetic mapping
B) identify a protein-coding region of a gene
C) cause disease
D) protect against disease
E) do none of the listed actions
Answer: A
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When a mycelium infiltrates an unexploited source of dead organic matter, what are most likely to appear within the food source soon thereafter?
A) fungal haustoria B) soredia C) fungal enzymes D) increased oxygen levels E) larger bacterial populations
The hormone glucagon _____
1.activates liver enzymes to produce glucose 2.is secreted by beta cells of pancreatic islets 3.stimulates muscle and fat cells to take up glucose 4.reduces levels of blood glucose
Which of the following is defined as "all of the various species living in the same area?"
Community Ecosystem Population Organism
Which process occurs during cellular migration and development into specialized tissue?
A) Cells are transferred to the appropriate region of the embryo via the bloodstream. B) Cells fuse to produce multinucleated giant cells. C) Similar cells attach themselves to each other by secreting glycoproteins. D) Most cells of the developing tissue undergo the process of apoptosis.