BIOS 100 TEST 2
1. In most plants, water and minerals are absorbed by .
A. the stems and roots
B. the stems
C. the roots
D. the leaves, stems, and roots
E. the leaves: C. the roots
2. Transpiration is an effective mechanism for moving water to the leaves in300-foot-tall
trees because of .
A. the cohesive strength of water that holds water molecules together
B. the cellulose and lignin in the walls of xylem cells
C. the force of gravity
D. the ability of plants to open and close their stomata
E. the ability of the central vacuole to release water: A. the cohesive strength ofwater that
holds water molecules together
3. In plants, transports from .
A. xylem; sugars; leaves to roots
B. phloem; sugars; leaves to roots and roots to leaves
C. xylem; water; leaves to roots and roots to leaves
D. xylem; water; leaves to roots
E. phloem; sugars; leaves to roots: B. phloem; sugars; leaves to roots and rootsto leaves
4. Woody plants such as giant redwoods contain greater amounts of sub- stances that make
them tougher and more rigid than other plants, and otherwoody plants, such as cellulose and
.
A. turgor
B. water
C. lignin
,D. phloem
E. vacuoles: C. lignin
5. Which of the following statements represents a true distinction betweenxylem and
phloem?
A. All of these statements represent distinctions between xylem and phloem.
B. Xylem transports sugars in either direction; phloem transports water fromroots to shoots.
C. Xylem transports materials from shoots to roots; phloem transports mate-rials in either
direction.
D. Xylem provides water and nutrient transport; phloem provides sugar trans-port.
E. Xylem provides support only; phloem provides transport.: D. Xylem provideswater and
nutrient transport; phloem provides sugar transport.
6. Water vapor leaves plants through openings called .
A. stamens
B. root hairs
C. cuticles
D. pistil
E. stomata: E. stomata
7. What internal signals are associated with dehydration?
A. high osmolarity
B. low blood pressure
C. All of these options are internal signals associated with dehydration.
D. low blood volume: C. All of these options are internal signals associated withdehydration.
8. The kidneys respond to a decrease in osmolarity by .
A. increasing or decreasing water excreted in the urine
B. decreasing water excreted in the urine
C. increasing water excreted in the urine
D. signaling the hypothalamus to increase ADH secretion
E. producing antidiuretic hormone (ADH): C. increasing water excreted in theurine
, 9. The organ that regulates the body's water balance is the
A. hypothalamus.
B. kidney.
C. heart.
D. liver.
E. bladder.: B. kidney.
10. People who are severely dehydrated produce
of urinethat is .
A. a low volume; dilute and light in color
B. a normal volume; a normal color (neither very light nor very dark)
C. a high volume; dilute and light in color
D. a high volume; highly concentrated and dark in color
E. a low volume; highly concentrated and dark in color: E. a low volume; highlyconcentrated
and dark in color
11. Dehydration is associated with osmolarity and
bloodpressure.
A. low; high
B. high; high
C. no change in; no change in
D. high; low
E. low; low: D. high; low
12. In order to maintain ideal internal conditions, the human body works tomaintain .
A. homeostasis
B. regular movement
C. insulation
D. heat output
E. movement: A. homeostasis
1. In most plants, water and minerals are absorbed by .
A. the stems and roots
B. the stems
C. the roots
D. the leaves, stems, and roots
E. the leaves: C. the roots
2. Transpiration is an effective mechanism for moving water to the leaves in300-foot-tall
trees because of .
A. the cohesive strength of water that holds water molecules together
B. the cellulose and lignin in the walls of xylem cells
C. the force of gravity
D. the ability of plants to open and close their stomata
E. the ability of the central vacuole to release water: A. the cohesive strength ofwater that
holds water molecules together
3. In plants, transports from .
A. xylem; sugars; leaves to roots
B. phloem; sugars; leaves to roots and roots to leaves
C. xylem; water; leaves to roots and roots to leaves
D. xylem; water; leaves to roots
E. phloem; sugars; leaves to roots: B. phloem; sugars; leaves to roots and rootsto leaves
4. Woody plants such as giant redwoods contain greater amounts of sub- stances that make
them tougher and more rigid than other plants, and otherwoody plants, such as cellulose and
.
A. turgor
B. water
C. lignin
,D. phloem
E. vacuoles: C. lignin
5. Which of the following statements represents a true distinction betweenxylem and
phloem?
A. All of these statements represent distinctions between xylem and phloem.
B. Xylem transports sugars in either direction; phloem transports water fromroots to shoots.
C. Xylem transports materials from shoots to roots; phloem transports mate-rials in either
direction.
D. Xylem provides water and nutrient transport; phloem provides sugar trans-port.
E. Xylem provides support only; phloem provides transport.: D. Xylem provideswater and
nutrient transport; phloem provides sugar transport.
6. Water vapor leaves plants through openings called .
A. stamens
B. root hairs
C. cuticles
D. pistil
E. stomata: E. stomata
7. What internal signals are associated with dehydration?
A. high osmolarity
B. low blood pressure
C. All of these options are internal signals associated with dehydration.
D. low blood volume: C. All of these options are internal signals associated withdehydration.
8. The kidneys respond to a decrease in osmolarity by .
A. increasing or decreasing water excreted in the urine
B. decreasing water excreted in the urine
C. increasing water excreted in the urine
D. signaling the hypothalamus to increase ADH secretion
E. producing antidiuretic hormone (ADH): C. increasing water excreted in theurine
, 9. The organ that regulates the body's water balance is the
A. hypothalamus.
B. kidney.
C. heart.
D. liver.
E. bladder.: B. kidney.
10. People who are severely dehydrated produce
of urinethat is .
A. a low volume; dilute and light in color
B. a normal volume; a normal color (neither very light nor very dark)
C. a high volume; dilute and light in color
D. a high volume; highly concentrated and dark in color
E. a low volume; highly concentrated and dark in color: E. a low volume; highlyconcentrated
and dark in color
11. Dehydration is associated with osmolarity and
bloodpressure.
A. low; high
B. high; high
C. no change in; no change in
D. high; low
E. low; low: D. high; low
12. In order to maintain ideal internal conditions, the human body works tomaintain .
A. homeostasis
B. regular movement
C. insulation
D. heat output
E. movement: A. homeostasis
