Birds store food in a modified portion of the lower esophagus called the
A. pharynx.
B. gizzard.
C. alimentary canal.
D. crop.
E. epiglottis.
Answer: D
You might also like to view...
The number of major histocompatability (MHC) protein combinations possible in a given population is enormous. However, an individual in that diverse population has a far more limited array of MHC molecules because _____
A) the MHC proteins are made from several different gene regions that are capable of rearranging in a number of ways B) MHC proteins from one individual can only be of class I or class II C) each of the MHC genes has a large number of alleles, but each individual only inherits two for each gene D) once a B cell has matured in the bone marrow, it is limited to two MHC response categories E) once a T cell has matured in the thymus, it can only respond to two MHC categories
The daughter cells produced by meiosis are ____
a. identical to the parent but genetically different from each other b. identical to each other but genetically different from the parent c. genetically different from the parent and each other d. genetically identical to the parent and each other e. genetically different from each other but with the same chromosome number as the parent
Each of the following is a product of the citric acid cycle except
A) CO2. B) ATP. C) NADH. D) acetyl CoA. E) FADH2.
Mitotic Cdk-cyclin is active when it is
A) singly phosphorylated. B) acetylated. C) doubly phosphorylated. D) doubly methylated. E) cleaved by proteases.