Mitochondria are organelles that
a. are necessary for the process of diffusion to take place
b. are found in the nucleus of some cells
c. initiate cell division in living cells
d. contain respiratory enzymes

D-contain respiratory enzymes

Explanation:

the inner membrane of the mitochondrion folds into cristae that increases the surface area of attachment of respiratory enzymes.

answer: 45

explanationyou have to add as well to be it could be

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).