Wings of birds and butterflies have similar functions, but different evolutionary origins. They are:
A. physiological structures.
B. homologous structures.
C. analogous structures.
D. phylogenetic structures.
C. analogous structures.
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Which of the following lipid compositions would yield the greatest membrane fluidity?
A. Phospholipids with long-chain, saturated fatty acids at low temperature B. Phospholipids with long-chain, unsaturated fatty acids, plus cholesterol at normal temperature C. Phospholipids with short-chain, unsaturated fatty acids, plus cholesterol at low temperature D. Phospholipids with short-chain, saturated fatty acids, plus cholesterol at normal temperature
Which of the following three-letter symbols represents an amino acid that is polar and uncharged?
A) pro B) gln C) ala D) asp E) his
Four of the five answers listed below are anthropoids. Select the exception
a. tarsier b. Old World monkey c. human d. ape e. gorilla
If a cell has a haploid number of 5, during mitosis there will be ________ chromosomes at metaphase, ________ chromosomes at anaphase, and ________ chromosomes per daughter cell at telophase
A) 10; 10; 10 B) 10; 10; 5 C) 5; 10; 5 D) 10; 20; 10 E) 5; 5; 5