Question

Fill in the blanks:
$a$. In birds, air sacs connected to 1____ supplement respiration
$b$. The class name reptilia refers to their creeping or 2____ mode of locomotion
$c$. In amphibians, the eyes 3____ eyelids
$d$. Cyclostomes are 4____ but migrate for spawning to 5____ water

• A. 1—lungs, 2—crawling, 3—do not have, 4—marine, 5—fresh
• B. 1—pneumatic bones, 2—swimming, 3—do not have, 4—marine, 5—fresh
• C. 1—lungs, 2—crawling, 3—have, 4—fresh water, 5—marine
• D. 1—lungs, 2—crawling, 3—have, 4—marine, 5— fresh

Answer 1

Answer: (A)

• In birds, air sacs connected to lungs supplement respiration.
• The class name reptilia refers to their creeping or crawling mode of locomotion.
• In amphibians, the eyes have eyelids.
• Cyclostomes are marine but migrate for spawning to fresh water