The ________ are aquatic reptiles that lack a shell
Fill in the blank(s) with correct word
crocodilians
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What is souring of crude oil and how does the petroleum industry control it?
What will be an ideal response?
Which of the following best describes the route of water into the water vascular system of a starfish?
A. Water enters through the madreporite into the ring canal and from thence into the radial canals to the ampullae and finally into the tube feet. B. Water enters the madreporite into the radial canals and from thence into the ring canal, then the ampullae and finally into the tube feet. C. Water enters the madreporite into the ampullae and from thence into the ring canal, then the radial canals to the ampullae and finally into the tube feet. D. Water enters the ampullae and then goes to the tube feet and from thence to the radial canals, then the ring canal, and finally exits through the madreporite. E. Water enters the ring canal, then goes into the radial canals, and finally through the madreporite to the ampullae and tube feet.
Which statement is true?
a. Gene mutations never occur independently of each other. b. Gene mutations are very common. c. Ionizing radiation is caused by chromosomal damage. d. Mutations are random. e. The loci of gene mutations can be predicted.
Transgenic animals are ________ modified organisms.
Fill in the blank(s) with the appropriate word(s).