Aresearcher may claim a causal relationship between variables if one variable influences another

false

Explanation:

Based on the information provided within the question it seems that this statement is false. Two variable only have a casual relationship if one of the variables causes the other one to exist, which does not seem to be the case in this situation. Instead this situation can be considered as a correlated relationship as a change in one variable influences the other.

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thymine. in rna, thymine is replace by uracil

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).