Radially symmetrical animals have a nerve
__________. Fill in the blank(s) with the appropriate word(s).
Answer: net
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What is the main difference between mismatch repair (MMR) in eukaryotes and prokaryotes?
A. Eukaryotes lack a functional Mut H and Dam methylase. B. Eukaryotes have proteins homologous to MutS and MutH but not MutL. C. Eukaryotes only repair the lagging strand. D. Prokaryotic MMR can repair small loops of unpaired nucleotides, whereas eukaryotes cannot. E. Both use exonucleases to eliminate the mismatched strand but eukaryotes only require 3'-5' exonucleases.
From their formation to ejaculation, sperm cells take the following pathway:
A. seminiferous tubule, epididymis, rete testis, urethra, ejaculatory duct, ductus deferens. B. seminiferous tubule, epididymis, rete testis, ejaculatory duct, ductus deferens, urethra. C. seminiferous tubule, epididymis, rete testis, ductus deferens, ejaculatory duct, urethra. D. seminiferous tubule, rete testis, epididymis, ductus deferens, ejaculatory duct, urethra. E. seminiferous tubule, rete testis, epididymis, ejaculatory duct, urethra, ductus deferens.
The basic structure of a virus contains:
a. a nucleic acid b. a cell wall c. a protein coat d. both choice 1 and 2 e. both choice 1 and 3
Current research in behavioral ecology focuses on the overall contribution that behavior makes to an animal's
A. competitive strategies. B. learning. C. length of life. D. foraging efficiency. E. fitness.