The bond between two amino acids is referred to as a(n) ____ bond
Some help with this please? Thanks.
Answer: peptide
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If two otherwise dissimilar organisms share similar genomic DNA, to what would you attribute the genomic similarity?
A. The shared genes are ancient and probably no longer function within the altered physiological states of modern organisms. B. The shared genes have evolved a number of times and have no phylogenetic significance. C. The two taxa are more closely related than formerly believed. D. The shared genes developed early in evolution and are likely to be applicable to a wide diversity of organisms. E. DNA is not a reliable basis for phylogenetic decisions.
Ecologist James H. Brown of the University of New Mexico has addressed species composition and
richness in experiments conducted since 1977 in the Chihuahuan desert of southeastern Arizona. In one experiment, the removal of three dominant species, all kangaroo rats, from several plots resulted in an increased diversity of other rodent species. This increase was ascribed both to lowered competition for food and also to an altered habitat, because the abundance of grass species __________ after the removal of the kangaroo rats. a. increased b. decreased c. did not change d. was threatened e. shrunk
Where are apocrine sweat glands the most abundant?
a. forehead b. neck c. axilla d. palms of the hands
What argument do scientists who support the metabolism-first model use to dispute the replicator-first model?
A) RNA can only be used to make proteins, not other nucleic acids. B) The replicator nucleic acid molecule would be too large and complex. C) Replicators cannot exist without metabolism. D) DNA cannot replicate without the help of proteins.