?
Figure 27.5
Use the figure above to answer the following question.
The letter "B" in the accompanying figure represents ____.
A. pericycle
B. endodermis
C. xylem
D. root cortex
E. phloem
Answer: E
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Circulation developed due to which of the following?
a. Animals got larger. b. Segmentation allows increasing specialization of body parts. c. The development of a complete digestive tract allows the specialization of regions to carry out a variety of functions. d. Circulatory systems allow more efficient transfer of materials and gave an advantage to the animals that developed them. e. None of these are true.
If a test tube of whole blood is subjected to centrifugation, the cells will be packed in the bottom of the
tube and the fluid above it will be designated a. water. b. serum. c. lymph. d. interstitial fluid. e. plasma.
Methods for determining the linkage group and genetic map in humans involve ________
A) DNA markers B) zygotene and pachytene DNA synthesis C) twin spots and tetrad analysis D) chiasmatype and classical analyses E) tetrad analysis and bromodeoxyuridine
Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?
A) Glycolysis requires oxygen, which was one of the first elements on Earth. B) All organisms use glycolysis; not all use the Krebs cycle and the electron transport chain. C) Glycolysis occurs in the mitochondria, which all organisms have. D) Glycolysis is the most efficient at producing energy.