How do organisms get the energy they need? by burning food molecules and releasing their energy as heat by breathing oxygen into the lungs and combining it with carbon dioxide by breaking down food molecules gradually and capturing their chemical energy by using the sun's energy to break down food molecules and form chemicals?

it would lead to upper respiratory infections and pneumonia.

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).