Annelid worms
A. are segmented.
B. only live in the ocean.
C. lack a coelom.
D. All of the above are correct.
A. are segmented.
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The two codons for glutamine are CAA and CAG. Which one of the following is likely to be the anticodon of a tRNA that is specific for glutamine?
A. GUC B. CGU C. CUG D. GCU
Follow the instructions in the procedure for identifying hydrogen bonds. How many hydrogen bonds are there between adenine and thymine?
a. none b. one c. two d. three
Where is the epiglottis located?
a. above the pharynx b. below the pharynx c. below the larynx d. below the esophagus e. in the middle of the pharynx
Insect growth and metamorphosis is controlled by the steroid hormones ecdysone and juvenile hormone (JH)
In insects like butterflies and moths that have a distinct larval (juvenile) and adult stage, the relative amount of JH determines whether the insect molts to the next juvenile stage or switches to become an adult. Can you think of a way to use this hormonal system to control caterpillar agricultural pests?