In the process of biological evolution, new species may evolve through exchange of genes from one species to another. This process is called.
A. proteome transfer.
B. horizontal gene transfer.
C. vertical evolution.
D. vertical descent with mutation.
E. genomic sciences.
B. horizontal gene transfer.
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Mature fungal spores are ____
a. always haploid b. always diploid c. always dikaryotic d. either diploid or dikaryotic e. either haploid or diploid
Structures that are shed in one piece include
a. the cuticle of roundworms. b. the exoskeleton of arthropods. c. human hair. d. all of the above.
A toxin that is secreted and acts upon a specific cellular target is called a(n)______
Fill in the blank(s) with the appropriate word(s).
James Watson and Francis Crick
a. established the double-stranded nature of DNA. b. established the principle of base pairing. c. explained how DNA's structure permitted it to be replicated. d. proposed the concept of the single-helix. e. discovered genes.