An individual eats a hamburger. which two systems must interact to transfer the nutrients in the hamburger to human muscle tissue?
(1)respiratory and excretory
(2)digestive and immune
(3)digestive and circulatory
(4)circulatory and respiratory

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).