Which muscle type is found in the walls of body tubes and cavities of vertebrates, such as blood
vessels and the intestines?
a. cardiac
b. smooth
c. skeletal
d. rough
e. epithelial
B
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RNA splicing joins together the coding regions of messenger RNA in their original linear order after the removal of introns
A. true B. false
Threatened species
A. are species likely to become endangered in the future. B. are found only in captivity. C. will be extinct within 100 years. D. are rare species that are exploited by humans. E. are currently in danger of extinction throughout all or most of their range.
Classification.Answer the following questions in reference to the five nucleotides listed below.
A. This nucleotide is a double-ring molecule. B. Three hydrogen bonds connect guanine to __________ in the DNA molecule. C. If one chain of a DNA molecule has a purine at a given position, this nucleotide complements it on the other chain. D. Erwin Chargaff's data indicates that within a species, the amount of adenine is always equal to the amount of this nucleotide. E. This nucleotide is not incorporated into the structure of the DNA helix.
Which of the following do not contribute to the existence of life in the bottom of oceans?
What will be an ideal response?