Which of the following statements is NOT correct about cnidarians?
A. Most are found in shallow coastal marine environments.
B. A jellylike mesoglea separates the two tissue layers.
C. The adult body is bilaterally symmetrical.
D. Stinging cells contain a threadlike nematocyst released to capture prey.
E. There are two tissue layers, an outer epidermis, and inner gastrodermis.
Answer: C
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Which diseases are associated with imprinting?
A. Angelman Syndrome B. LHON C. Alzheimer's Disease D. All of the answers are correct
The primary function of DNA ligase is to
a. cut the two strands of DNA molecule prior to replication. b. attach free nucleotides to a growing chain. c. remove bases that might have been inserted incorrectly. d. seal any tiny gaps in the new DNA. e. fragment old DNA that is no longer of use to the cell.
There are two different alleles for the number of fingers on the hands: five-finger allele and six-finger allele. When both the five-finger allele and the six-finger allele are present in the same individual, the individual has six fingers on each hand. Which allele is dominant?
A. 6 fingers B. 7 fingers C. 1 finger D. 5 fingers E. 11 fingers
Cardiac muscle cells are
a. involuntary. b. spindle-shaped. c. multinucleated. d. slow contracting. e. all of these.