When individuals have mitochondrial disorders, why are the skeletal and heart muscles and the brain most often affected?
a. They are the most important organs.
b. They have the highest energy needs.
c. They are generally very fragile.
d. They have fewer mitochondria in the cell.
e. They are the most complex organs.
ANSWER: b
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A DNA sequence 5? ATGGGGGACACC 3? encodes the amino acids Met Gly Asp Thr. A mutation changes the sequence to 5? ATGAGGGGACACC 3? that encodes the amino acids Met Arg Gly His. What type of mutation has occurred?
A) frameshift mutation B) missense mutation C) silent mutation D) nonsense mutation
In the near future, the human population is predicted to involve
A. a worldwide decrease in population growth due to limited resources.
B. a continuation of human population growth at the same pace as in the previous century.
C. a decrease in growth in most, but not all, more-developed countries and continued growth in most less-developed countries.
D. an increase in population growth in all countries in the world.
TRAIT SPECIESABCDE111011210010310011411111511111600010 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which pair of species shares the greatest number of derived characters (synapomorphies)?
A. 2 and 4 B. 4 and 5 C. 3 and 4 D. 1 and 4 E. 2 and 5
Four of the following animals form eusocial groups. Which one is the exception?
A. Termites B. Mole rats C. Wolf pack D. Honey bees E. Ants