Which of the following can be used to compare the amount of radioactively
labeled dna in two or more samples?

a. water bath
b. digital balance
c. petri dish
d. scintillation counter
submit

D. Scintillation counter  

Explanation:

DNA is usually labelled with radioactive phosphorus, which is a β emitter, so you need a device that can detect β particles.

A scintillation counter detects β particles because they emit a flash of light when they hit a phosphor. The device converts the flashes into electrical signals, amplifies then about a million times, and then counts them.

A, B, and C are wrong. They are all common laboratory equipment, but they can't detect radioactivity of any sort.

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).