Sympathetic and parasympathetic nervous system responses usually oppose each other
Indicate whether the statement is true or false
TRUE
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Strolling in the Sonoran Desert, you come upon a stately Saguaro cactus. The large central "trunks" of this cactus are covered with numerous smaller spines
The central stalks are modified _________ used for water storage and spines are modified ______ used for protection. A) stems; leaves B) leaves; leaves C) petioles; leaf blades D) leaf blades; trichomes E) stems; fruits
Viruses can be divided into seven basic classes. This classification is determined by:
A. nucleic acid of genome. B. type of host infected. C. cellular location of infection. D. presence of nuclear DNA. E. virus size.
The archaeplastida includes all of the following EXCEPT
a. red algae b. land plants c. diatoms d. green algae e. charophytes
Bicarbonate is an important buffer in blood and its concentration is regulated by the
A) heart. B) lungs. C) liver. D) kidneys. E) pancreas.