Which of the following information led scientists to believe that archaeans belong to their own distinct
domain?
a. They have a cell wall synthesized from a unique carbohydrate.
b. The genetic material of archaeans is RNA, not DNA.
c. Many archaeans live in extreme environments tolerated by no other organisms.
d. Archaeans do not utilize ATP to do cellular work.
e. Archaeans have unique cellular structures not found in either eukaryotic or prokaryotic
cells.
C
You might also like to view...
The main DISADVANTAGE of excessive gluconeogenesis during prolonged postabsorptive periods is that
A. continued protein breakdown can impair enzymatic activity and plasma membrane functions. B. carbohydrate buildup in the liver impairs its function. C. the brain is exposed to levels of glucose that are too high. D. tissues other than the brain increase glucose utilization. E. glucose absorption from the gut is impaired.
Which drug works by encouraging neurotransmitter release from the presynaptic cell?
a. caffeine b. alcohol c. cocaine d. depression medication e. heroin
Afferent neurons:a
transmit information to the central nervous system. b. provide support for the neurons. c. connect motor and sensory neurons. d. transmit information from the central nervous system to effectors. e. are part of the central nervous system.
In what order did these organisms diverge from the lineage of the common ancestral primate?
A. H. neandertalensis, H. ergaster, H. habilis, gorillas and chimpanzees, hominins B. monkeys, gibbons, prosimians, orangutans, H. habilis, H. ergaster, humans C. gibbons, lemurs, tarsiers, H. habilis, monkeys, H. neandertalensis, hominins D. prosimians, monkeys, gibbons, orangutans, gorillas and chimpanzees, hominins