The smallest animals are ectotherms
Indicate whether the statement is true or false
TRUE
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In the process of mRNA splicing, the lariat structure is the ____
a. splicing complex
b. region where two exons are pasted together c. enzyme that cuts the pre-mRNA d. released intron e. region where two introns are pasted together
The pancreas secretes bicarbonate to digest nucleic acids
1.True 2.False
During the process of swallowing, the
a. esophagus is temporarily closed by the glottis. b. epiglottis closes the trachea leading to the lungs. c. pharynx restricts food entry to the esophagus. d. epiglottis seals the esophagus. e. glottis seals the esophagus.
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.