The portion of potential resources and conditions that an organism actually exploits as a result of interactions with other species is its
A) home range.
B) territory.
C) realized niche.
D) fundamental niche.
C
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When E. coli cells produce the amino acid tryptophan, a cluster of five genes is transcribed together. This cluster of genes is referred to as the
A. trp transcriptional operator. B. trp regulator. C. trp suppressor. D. trp operon. E. trp promoter.
The ____ of flagellated protozoans are analogous to the ____ of prokaryotes
a. cytoskeleton; flagellum b. endoplasmic reticulum; ribosome c. fimbriae; Golgi body d. pellicle; cell wall e. cytoskeleton; plastid
Which hormone causes contraction of the uterus?
a. cortisol b. oxytocin c. prostaglandins d. progesterone e. estrogen
The function of RNA polymerase is to
A) catalyze the formation of phosphodiester bonds between deoxyribonucleotids.
B) catalyze the formation of phosphodiester bonds between ribonucleotides.
C) cleave mRNA to remove introns.
D) activate tRNAs.