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.

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

Four of the five answers listed below are anthropoids. Select the exception

a. tarsier b. Old World monkey c. human d. ape e. gorilla

Biology & Microbiology

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

Biology & Microbiology