The excretory system filters and deals with waste
materials so that the body can maintain a stable internal
environment called

Homeostasis

Explanation:

Homeostasis refers to the body's ability to maintain a stable internal environment (regulating hormones, body temp. by sweating for example, and internal water balance, etc.).

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).