Photorespiration in chloroplasts differs from cellular respiration in mitochondria in that ___
A. ATP is required for photorespiration but is
a product of mitochondrial respiration
B. NADH supplies high energy electrons in
mitochondrial respiration, whereas RuBP
supplies the electrons necessary for
photorespiration.
C. photorespiration supplies plant cells with
ATP. Mitochondrial respiration supplies
animal cells with ATP.
D. carbon dioxide is produced in
mitochondrial respiration, and oxygen is
produced in photorespiration
A
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According to the acid-growth hypothesis, auxin works by _____
A) dissolving sieve plates, permitting more rapid transport of nutrients B) dissolving the cell membranes temporarily, permitting cells that were on the verge of dividing to divide more rapidly C) changing the pH within the cell, permitting the electron transport chain to operate more efficiently D) increasing wall plasticity and allowing the affected cell walls to elongate E) greatly increasing the rate of deposition of cell wall material
Root systems that are adapted to absorb water and nutrients from the upper layers of soil are called
a. adventitious root systems. b. prop root systems. c. fibrous root systems. d. taproot systems. e. storage root systems.
When the death of species is less imminent, but the population of a particular species is quite small, it is defined asbeing:a
extinct. b. extant. c. endangered. d. threatened. e. endemic.
Which sentence best describes the difference between plant cell division and animal cell division?
a. In animal cells, but not plant cells, cytokinesis is accomplished by formation of a cleavage furrow. b. In animal cells, replication of chromosomes occurs during interphase, while in plant cells replication occurs when the nuclear envelope disintegrates. c. In plant cells, centrosomes have an important role in spindle formation, while in animal cells centrosomes do not function during cell division. d. In plant cells, but not animal cells, cytokinesis is accomplished by formation of a cleavage furrow.