The euglenoids are characterized by the disc-shaped cristae of their chloroplasts
Indicate whether the statement is true or false.
ANS: F, mitochondria
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Characteristics that have arisen in organisms as a result of common evolutionary descent are said to be ______________ characteristics.
A. homologous B. homoplastic C. adaptive D. derived E. ancestral
Reduction is defined as the addition of ________. In biological systems, these are usually accompanied by protons in a process called ________.
Fill in the blank(s) with the appropriate word(s).
Mutations that occur in somatic cells are:
A) responsible for the appearance of human diseases such as sickle-cell anemia. B) always harmful. C) never harmful. D) passed on to successive generations when they are incorporated into gametes. E) not passed on to future generations.
The Na+-K+ ATPase is also known as the Na+-K+ pump. It is responsible for maintaining the high extracellular sodium ion concentration and the high intracellular potassium ion concentration. What happens immediately after the pump hydrolyzes ATP?
(a) Na+ is bound (b) ADP is bound (c) the pump is phosphorylated (d) the pump changes conformation