Answer the following questions true (T) or false (F)
1. Batesian mimicry involves several harmful species evolving the same kind of characteristics.
2. A mutualistic relationship involves two species who both benefit from the relationship.
3. In a commensal relationship, one species benefits while the other one is harmed.
1. FALSE
2. TRUE
3. FALSE
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Which one of the following statements most accurately describes methylation?
A. Methyl groups are most often added to cytosines adjacent to guanine bases in or near the promoter sequence, increasing the probability of gene expression. B. Methyl groups are most often added to cytosines adjacent to guanine bases in or near the promoter sequence, decreasing the probability of gene expression. C. Methyl groups are most often added to adenine-thymine base pairs because they are held by only two hydrogen bonds, and this increases the probability of gene expression. D. Methyl groups are most often added to guanine-cytosine base pairs because they are held by three hydrogen bonds, and this decreases the probability of gene expression. E. Methyl groups are added to most bases in the promoter region of a specific gene so that RNA polymerase and its associated proteins will bind more efficiently.
Genomic technology allows researchers to use ____ to survey the genome to detect associations between common
variations and a specific phenotype. a. pedigrees b. continuous traits c. chromosome number d. nucleotide variations e. RNA
Lipids are important to biological systems because
A) they are solid at body temperature so they stabilize membranes. B) some lipid types are potentially large sources of energy to perform cellular work. C) most help to buffer aqueous solutions in the body. D) all lipids are very soluble in water. E) they are able to store and transmit genetic information.
Which of the following treatments can cure lung cancer?
Select one: a. pneumonectomy b. steroids c. antibiotics d. mucus-thinning drugs e. tracheotomy