When dna molecules are heated, the two strands at a particular temperature and that temperature is called the dna's melting point. some dna molecules seperate at lower temperature while other dna molecules take more energy to spilt or "melt" and these seperate at higher temperatures. scientists have found that dna stands that have more g-c pairs (rather than a-t pairs) are harder to melt and require more energy to melt. why do you think that is?

what's the question?

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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).