A circular DNA molecule with two restriction enzyme cut sites will yield three fragments on digestion
Indicate whether the statement is true or false
FALSE
Explanation: A circular molecule will yield two DNA fragments when cleaved in two places.
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As a new curator for a large public aquarium in your city, you are in charge of correctly identifying some of the animals presently in your care. You have two adult animals in tanks in front of you, and you know that one is a lamprey, and the other is a hagfish. Which feature would allow you to correctly identify each animal?
A. Lampreys lack jaws, but hagfish are jawed fish. B. Lampreys are parasitic, while hagfish are not parasitic. C. Hagfish must live in fresh water, while lampreys are entirely marine. D. Hagfish are noted for their extensive fins, while lampreys lack fins.
Which of the following hormones is NOT
related to sexual reproduction?
a. GnRH b. ACTH c. LH d. FSH e. all of these are hormones related to sexual reproduction
Tracheids and vessel elements make up
A. phloem B. trichomes C. xylem D. meristem
Which statements about the Lake Victoria cichlid fishes are true? Check all that apply.
A. The adaptive radiation of the Lake Victoria cichlids may have resulted from a key evolutionary innovation. B. Many of the Lake Victoria cichlids have very specialized adaptations that allow them to occupy diverse habitats within the lake. C. Speciation of the Lake Victoria cichlids was mainly sympatric. D. The diversity of the Lake Victoria cichlids continues today because the lake is devoid of predators. E. The adaptive radiation of the estimated 300 species of cichlid fish was very rapid and took place during the last 200,000 years.