What is the main difference between an open circulatory system and a closed one?
A. An open system will have the blood leave the blood vessels and dump into the lungs or gills while the closed one will retain the blood within the hemocoel.
B. The blood within a closed circulatory system does not contain hemoglobin.
C. An open system will have the blood leave the blood vessels and dump into the lungs or gills while the closed one will retain the blood within the system.
D. An open system will have the blood leave the blood vessels and dump into the hemocoel while the closed one will retain the blood within the system.
E. An open system will keep the blood within the blood vessels while the closed one will dump the blood into the hemocoel.
Answer: D
You might also like to view...
Which of the following is the correct order of floral organs from the outside to the inside of a complete flower?
A) petals ? sepals ? stamens ? carpels B) sepals ? stamens ? petals ? carpels C) spores ? gametes ? zygote ? embryo D) sepals ? petals ? stamens ? carpels E) male gametophyte ? female gametophyte ? sepals ? petals
__________ are evidence of life in the distant past. Fill in the blank(s) with the appropriate word(s)
The raw materials used for photosynthesis include
a. O2. b. C6H12O6. c. CO2 & H2O. d. CH2O.
Within a large population, if no mutations occur, no migration occurs, all matings are random, and each individual has an equal chance of reproducing, which of the following will probably happen?
A) No evolution will occur. B) Natural selection will occur at the normal rate for that species. C) A change in allele frequency will lead to rapid evolution. D) Extinction will result. E) A bottleneck will occur.