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Unformatted text preview: cted from plants growing in the desert of southwest Arizona. Which species probably undergoes the most evaporative cooling in this environment? (A) (B) (C) (D) (E) Encelia farinosa Haworthia attenuata Bursera latiflora Scilla violaceae Agave deserti GO ON TO THE NEXT PAGE.
Unauthorized copying or reuse of any part of this page is illegal. 24 58. A piece of prospective belly epidermis of a newt neurula-stage embryo is grafted to the prospective mouth region of a frog neurula, replacing the frog epidermal tissue at that spot. The grafted embryo continues to develop and forms a newt mouth and teeth at the position of the graft. This result is consistent with which of the following? (A) Newt tissue develops autonomously according to its original fate, despite its new location in the frog embryo. (B) Newt tissue dedifferentiates whenever it is grafted. (C) Tissues of the frog neurula induce the newt tissue to express frog-specific genes that it would not normally express. (D) The mouths and teeth of frogs and newts are the same in type. (E) The frog tissues of the neurula induce the newt tissue to form mouthparts. 59. Some chemoautotrophic bacteria living around deep-sea vents obtain their energy by converting (A) (B) (C) (D) (E) alcohols to aldehydes hydrogen sulfide to elemental sulfur carbon dioxide and hydrogen to methane iron oxides to iron nitrogen to ammonia 61. In a plant growing vigorously under normal conditions without water stress, in which tissue would you expect to find the lowest (most negative) water potential? (A) (B) (C) (D) (E) Root epidermal cell Root cortical parenchyma Root endodermis Stem xylem Leaf mesophyll parenchyma 62. In organisms with closed circulatory systems, fluid leaves the blood of capillary networks at the arterial end and returns to blood at the venous end for which of the following reasons? (A) Osmotic pressure increases prior to dehydration. (B) Osmotic pressure difference dominates at the arterial end; hydrostatic pressure difference dominates at the venous end. (C) Hydrostatic pressure difference dominates at the arterial end; osmotic pressure difference dominates at the venous end. (D) Hydrostatic pressure drops during diastole. (E) Hydrostatic pressure difference dominates at both the arterial and the venous ends. 63. Which of the following mineral nutrients is directly involved in light absorption during photosynthesis? (A) (B) (C) (D) Zn2+ Mn2+ Cu2+ Mg2+ 60. The ability of a desert rodent’s kidneys to form highly concentrated urine is largely attributable to (A) a high glomerular filtration rate (B) the production of a very salty ultrafiltrate in the glomerulus (C) the ability of cells lining the proximal convoluted tubule to absorb water (D) long loops of Henle that pass through tissues of increasing salt concentrations (E) distal convoluted tubules that are impermeable to water (E) Ca2+ GO ON TO THE NEXT PAGE. Unauthorized copying or reuse of any part of this page is illegal. 25 64. Most of the dry mass of...
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This document was uploaded on 03/16/2014 for the course BIO 1434 at UT Arlington.
- Spring '14