Research on starlings indicates that young birds migrate by _______________, but older birds use true __________________.
A. orientation; navigation
B. navigation; migration
C. migration; orientation
D. navigation; orientation
A. orientation; navigation
You might also like to view...
Mycobacterium tuberculosis is very difficult to stain because of the
A) presence of ribosomes in the cytoplasm. B) location of the DNA within the cell. C) large amounts of a waxy lipid present in its cell wall. D) lack of a cell wall.
Insertion of two bases into the coding region of a gene just after the start codon of a gene will result in a ____
mutation.
a. missense b. chromosomal c. frameshift d. silent e. nonsense
All of the following are adaptations of tuna for fast swimming except:
a. warmer than ambient body temperature. b. retractable pectoral fins. c. rounded tail. d. operculum that lies tightly against the body. e. sickle-shaped tail.
Answer the following questions true (T) or false (F)
1. In recombination (crossing over), DNA is exchanged between homologous, non-sister chromatids. 2. In humans, the sperm contributes the chromosome that determines whether the child will be a boy or a girl. 3. If an egg is fertilized by a sperm carrying an X chromosome, the resulting child might be either a boy or a girl, depending on the sex chromosome carried by the egg.