The original differentiation of prokaryotes and eukaryotes was based on structures found in prokaryotes that are lacking in eukaryotes.
Answer the following statement true (T) or false (F)
False
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The major inhibitory neurotransmitter of the human brain is _____
A) acetylcholine B) epinephrine C) glutamate D) nitric oxide E) gamma-aminobutyric acid (GABA)
The figure included shows the body temperature of lizards versus air temperature in two different habitats—open and shaded forest. Which one of the following conclusions is best supported by these data.
A. Lizards are more active in open habitats.
B. Lizards sunbathe more in open habitats.
C. Lizards in shaded forest habitats eat more to maintain their temperature.
D. The body temperature of lizards is more constant in open than in shaded forest habitats.
E. The negative effect of air temperature on body temperature is less in shaded forest habitats because the temperature varies less there.
Which of the following statements is false?
a. Transpiration creates tension on water columns in a plant. b. Transpiration is the loss of water in gaseous form from a plant. c. Osmotic gradients account for the absorption of water by roots. d. Transpiration occurs mostly through the cuticle. e. Hydrogen bonds account for the cohesiveness of water molecules.
Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will phagocytize asbestos, but are not able to degrade it. As a result, asbestos fibers accumulate in _____.
A) mitochondria
B) ribosomes
C) peroxisomes
D) lysosomes