After an organism dies, what happens to its c-14 to c-12 ratio

After 5,730 years, the amount of carbon 14 left in the body is half of the original amount.

the answer is d. chordata

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).