1. which of the following statements best supports all three species concepts?
a. biological diversity does not vary in a smooth, incremental way.
b. in some cases, it may be difficult to predict whether incipient species will continue to diverge.
c. virtually all species exhibit some degree of genetic recombination among individuals.
d. hybrid zones may form if reproductive isolation is incomplete.
e. a single lineage may evolve over time without giving rise to a new species.

Previous pagenext pagepage 3 ofquestion 3 (1 point)which of the following consist of cells that do not have a nucleus? of the above

Environmental differences within ecosystems are generally caused by

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression.c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression.d-neelaredoxin is only produced when there is exposure to o2 or h2o2.