Which of the following statements about nitrogenous waste excretion is correct?
A. Uric acid is less toxic than ammonia, but
more energetically costly to produce.
B. Ammonia is more toxic than urea, but
requires less water for excretion.
C. Urea is less toxic than uric acid, but more
energetically costly to produce.
D. Uric acid is less toxic than urea, but
requires more water for excretion.
E. Ammonia is less toxic than uric acid, but
requires more water for excretion.
A
You might also like to view...
Which covalent bond involves only 2 electrons:a
single b. double c. triple d. single and double. e. single and triple.
Algae with two flagella are
A. diatoms. B. dinoflagellates. C. cyanobacteria. D. red algae.
You have joined a lab studying DNA replication in E. coli. The graduate student you are working with has identified a mutation in primase that makes primase very inefficient. Your project is to characterize the cells with this mutation. Predict the defects you would most likely see in the mutant E. coli cells.
A. inefficient Okazaki fragment joining B. a longer total time to replicate DNA C. a delay in the unwinding of DNA D. a delay in DNA polymerase beginning synthesis E. rapid lagging-strand synthesis but slow leading-strand synthesis
Which of the following is a fungal skin disease?
A) dry rot B) skin rust C) Dutch elm disease D) ringworm