Which of the following statements is true regarding respiration in birds? Choose all that
A. Bird lungs inflate due to negative pressure
in the chest cavity.
B. Bird lungs deflate due to negative pressure
in the chest cavity.
C. Oxygen enters the bloodstream via
crosscurrent exchange.
D. Oxygen enters the bloodstream via
countercurrent exchange.
E. Respiration depends on the movement of
air through air sacs.
F. Respiration depends on the movement of
air through spiracles.
C,E
You might also like to view...
Chloroplasts utilize light energy to make ____
a. carbohydrates b. fats c. proteins d. nucleic acids e. steroids
Of the comparisons listed below, which is not true in distinguishing DNA from RNA?
A. DNA is a long double-strand molecule while RNA is a shorter single-strand molecule. B. All of the answer choices are correct. C. DNA and RNA are different in that RNA has uracil instead of thymine. D. DNA has a main function of storing genetic information, while RNA is used to build specific proteins in a cell. E. DNA is a molecule that stores and regulates our genetics, while RNA is used for cellular energy storage and release for biological functions.
Amniocentesis and chorionic villus sampling are two methods of prenatal diagnosis. One important
difference between these techniques is that A. chorionic villus sampling is more routinely prescribed. B. amniocentesis can diagnose chromosome disorders, while chorionic villus sampling cannot. C. chorionic villus sampling can be performed earlier than amniocentesis. D. maternal risks are higher with chorionic villus sampling. E. the risk of miscarriage is higher with amniocentesis than with chorionic villus sampling.
Which of the following processes occurs in eukaryotes but not prokaryotes?
A) DNA replication B) capping C) transcription D) translation E) gene regulation