Many sea snakes have adapted to a completely marine existence. What are 3 adaptations of sea snakes that have allowed this lifestyle?
What will be an ideal response?
Sea snakes are adapted to a marine existence by being ovoviviparous. They no longer have to deposit their eggs in terrestrial environments. Sea snakes are also capable of long-term submergence because they have large lung capacity allowing them to stay under longer. The trachea of sea snakes is also adapted to absorb oxygen, and sea snakes can absorb oxygen across their skin. Finally, sea snakes are capable of lowering their metabolic rates during a dive as a means of conserving oxygen.
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a. Blue b. Blue-green c. Purple d. Red
Thorough mixing of oxygen and nutrients within
lakes in temperate regions occurs in a. winter and summer. b. winter and spring. c. spring and summer. d. spring and autumn. e. summer and autumn.
The cowper's gland secretes what?
What will be an ideal response?
Extracts of pathogenic bacteria can transform harmless bacteria to harmful bacteria unless ____ enzymes are added to the extract.
A. protein transfer B. mRNA-degrading C. tRNA-degrading D. DNA-degrading E. nucleic transfer