What molecule will allow some bacteria to be resistant to many penicillins?
A. Imipenem
B. Aztreonam
C. Synercid
D. Penicillinase
E. Clavulanic acid
Answer: D
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Answer the following statements true (T) or false (F)
1. Hagfish are craniates but are not vertebrates. 2. A hagfish is a not a fish. 3. Lampreys' main body support is the notochord, not a vertebral column. 4. Sharks have cartilaginous skeletons because bone-forming ability had not yet evolved in vertebrates when they originated. 5. The swim bladder is an organ in primitive fish from which the lungs of terrestrial vertebrates developed.
During metaphase of mitosis, how many telomeres are present in a cell in which 2n = 12?
A) 6 B) 12 C) 24 D) 48 E) 1200
Of these 4 genotypic classes of offspring, which arose from a parental gamete produced by the F1 females? (Select all that apply.)
In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked alleles. The wild type alleles (sn+ and ct+) are responsible for straight bristles and intact wings, respectively. A female homozygous for sn and ct+ is crossed to a sn+ct male. The F1 flies are interbred. The F2 males are distributed as follows:
A) sn+ ct+
B) sn ct
C) sn+ ct
D) sn ct+
In humans, many types of cancers are associated with chromosomal mutations
Indicate whether the statement is true or false