Which of the following are normally
associated with asteroids or their impact on
Earth?
a. iridium
b. tektites
c. shocked quartz
d. craters
e. all of these
E
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Answer the following statements true (T) or false (F)
1. A gene is any DNA sequence that is transcribed to any type of RNA. 2. In eukaryotic cells, a poly-A tail helps attach the ribosome to the mRNA molecule and may also determine how long the mRNA is retained within the cell. 3. Cystic fibrosis may be caused by a protein that does not fold correctly into its final form. 4. Because cells are very efficient in the processes that they carry out, very little energy is needed for the cell to make proteins. 5. In eukaryotic cells, an mRNA molecule can only be translated by one ribosome at a time.
Which area, A, B, C, or D, represents the area of a boreal forest biome?
1.A
2.B
3.C
4.D
The cervix is part of the
a. labium minor. b. ovary. c. uterus. d. oviduct. e. vagina.
Which of the following is known for its swarming motility?
A. Proteus mirabilis B. Escherichia coli C. Klibsiella pneumonae D. Pseudomonas aeroruginosa