Life Without A Pet

Life without air would be

"Life without air" was first studied by

How does the heart manage to beat nonstop throughout life without getting fatigued ?

Infertility is the relative state of failure to conceive after how many year/years of sexual life without contraception?

"Life would be impossible without plants". Explain.

$ The Heterotroph theory of origin of life was proposed by Haldane. ! That part of earth which is without any traces of life is called Abiotic earth.