In a sample of double-stranded DNA, 30% of the nitrogenous bases are adenine (A). What percentage of the nitrogenous bases in the sample are thymine (T)?
Choose 1
A. 20%
B. 30%
C. 60%
D. 70%

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

Asea turtle has washed up on a remote section of a beach. this known as a stranding occurs when a dead,sick or injured sea turtle washed up on the shoreline. which statment best explain why stranding should be reported immediately to local authorities

Isotopes of the same element have differ in their