Which of the following statements about the human respiratory system is false?
a) When we breathe in, air travels from the pharynx to the trachea.
b) The bronchioles branch into bronchi.
c) Alveolar ducts connect to alveolar sacs.
d) Gas exchange between the lungs and blood takes place in the alveolus.
Ans: b) The bronchioles branch into bronchi.
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Classification of viruses into families involves determining all the following characteristics except
A. biochemical reactions. B. type of nucleic acid. C. presence of an envelope. D. type of capsid. E. number of strands in the nucleic acid.
Water can ________ heat to help prevent rapid body temperature changes
Fill in the blank(s) with correct word
Which of the following statements about tRNA is FALSE?
A. tRNAs are produced in the nucleus. B. tRNAs of both eukaryotes and prokaryotes share common features. C. tRNAs possess an anticodon complementary to the codon. D. Functional tRNAs have been spliced by spliceosomes. E. The two-dimensional structure of tRNAs exhibits a cloverleaf pattern.
Solar energy is the same thing as heat energy.
Answer the following statement true (T) or false (F)