The gap between the transmitting and receiving neurons in a chemical synapse is known as the
A) node of Ranvier.
B) ion channel.
C) gap junction.
D) synaptic cleft.
Answer: D
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Which plants are characterized by a conducting system, the possession of cuticles, specialized stems, and roots, stomata, and, in many species, seeds?
A. liverworts B. mosses C. tracheophyte D. horsetails E. club mosses
A prion is a(n)
A) very small virus. B) a virus built only of protein. C) infectious protein. D) a subatomic particle, along with a neutron and an electron.
Maternal PKU can result in serious effects in fetuses. This problem occurs because:a
the fetus is homozygous for PKU and therefore cannot metabolize phenylalanine. b. the fetus is usually homozygous dominant and therefore has PKU. c. the mother is heterozygous for PKU and therefore cannot metabolize phenylalanine. d. the mother is homozygous dominant for PKU and cannot metabolize phenylalanine. e. the mother is homozygous recessive and cannot metabolize phenylalanine
A stalk of celery is placed in a solution of blue colored dye. After one hour, the leaves have blue fluid in their veins
Which property of water is being demonstrated? a. surface tension b. high specific heat c. adhesion and cohesion d. evaporation and cooling e. lower density as a solid than as a liquid