Birds that have long narrow bills used for eating bivalves and other invertebrates are:
a. gulls.
b. pelicans.
c. shore birds.
d. tubenoses.
e. skuas and jaegers.
C
You might also like to view...
Answer the following statements true (T) or false (F)
1. In epistasis, two opposing genes are expressed equally. 2. In eukaryotes, DNA wraps around proteins known as histones inside the nucleus of the cell. 3. Telomeres grow in length with each round of DNA replication. 4. Prokaryotic mRNA is more stable than eukaryotic mRNA because its maturation takes fewer steps. 5. Each domain of organisms has its own unique codons to code for protein synthesis.
What is one difference between using restriction endonucleases and mechanical shearing of DNA?
A) Restriction endonucleases cut DNA at known specific sites while shearing occurs at random sites. B) Restriction endonucleases cut DNA at random sites while shearing occurs at known specific sites. C) DNA cut with restriction enzymes can be used for cloning and DNA broken by shearing cannot. D) Restriction enzymes produce larger fragments on average than shearing.
Brucella bacteria are considered a potential agent of bioterrorism because
A) they are not susceptible to antibiotics. B) they easily become airborne. C) infection causes a fever. D) it is a endospore-forming organism. E) it causes ulcerating lesions of the skin.
A DNA double helix that is exposed on one side to DNase I or II (enzymes that nick one strand of DNA rather than cleave both) would be expected to generate single strands that average 10.5 bases in length, the length of a helical turn of DNA
However, DNase treatment of core nucleosomal DNA produces fragments that average 10.0 bases at the ends and 10.7 bases in the middle. What does this suggest? What will be an ideal response?