Circulatory systems have the primary benefit of overcoming the shortcomings of
A) temperature differences between the lungs and the active tissue.
B) the slow rate at which diffusion occurs across cells.
C) communication systems involving only the nervous system.
D) having to cushion animals from trauma.
E) fetal organisms maintaining an optimal body temperature.
Answer: B) the slow rate at which diffusion occurs across cells.
You might also like to view...
Soil nutrients that are leached from soils into ponds or other bodies of water can contribute to such phenomena as: (Check all that apply)
_____ Reduced production of water plants _____ Excess growth of certain algae _____ Increased nutrients for land plant growth _____ Reduced fertility of soils
Which event occurs during interphase?
a. The cytoplasm divides. b. The cell doubles its cytoplasmic contents. c. The nuclear envelope disassembles. d. The nucleus divides. e. Protein synthesis is halted.
Succession occurs in both aquatic and terrestrial environments
Indicate whether the statement is true or false
While exploring a newly exposed shoreline, you find a new protist. It appears to be multicellular, it uses carbon dioxide from the air to carry out photosynthesis, and its chloroplasts closely resemble those of ferns and grasses
This organism is most likely to belong to the group A) apicomplexan. B) brown alga. C) slime mold. D) green alga. E) diatom.