All of the following statements about the cohesion-tension model are true EXCEPT
A. it is a model of how water and minerals are transported in xylem.
B. it is dependent on the cohesive and adhesive properties of water.
C. there is no expenditure of energy.
D. tension created by transpiration in the leaves pulls water along the phloem from the roots hairs to the leaves.
Answer: D
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Which of the following regions produces hormones that are secreted by the pituitary gland?
A. cerebrum B. cerebellum C. thalamus D. hypothalamus E. medulla oblongata
Minerals differ from nutrients because minerals __________
a. do not contain carbon b. are organic c. are only required in small quantities d. are essential to the diet
The term diplococcus refers to an irregular cluster of spherical bacterial cells.
Answer the following statement true (T) or false (F)
The pyramid of energy illustrates
a. the first law of thermodynamics. b. the diminishing of usable energy as it is transferred through an ecosystem. c. that energy can be recycled. d. the biological magnification of materials in an ecosystem. e. the diminishing number of organisms at each trophic level