John Green Quotes

According to the Law of Biogenesis, life arises only from preexisting life.

It is not a simple life to be a single cell, although I have no right to say so, having been a single cell so long ago myself that I have no memory at all of that stage of my life.

The dream of every cell is to become two cells.

A zygote is a gamete's way of producing more gametes. This may be the purpose of the universe.

We all come into existence as a single cell, smaller than a speck of dust. Much smaller. Divide. Multiply. Add and subtract. Matter changes hands, atoms flow in and out, molecules pivot, proteins stitch together, mitochondria send out their oxidative dictates; we begin as a microscopic electrical swarm. The lungs the brain the heart. Forty weeks later, six trillion cells get crushed in the vise of our mother’s birth canal and we howl. Then the world starts in on us.

Life cannot arise spontaneously but comes only from preexisting life.

Life needs a membrane to contain itself so it can replicate and mutate.

Life is the division of human cells, a process which begins at conception.

I realized that nature had invented reproduction as a mechanism for life to move forward, as a life force that passes right through us and makes us a link in the evolution of life. Rarely seen by the naked eye, this intersection between the animal world and the plant world is truly a magic moment.

If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, under appropriate conditions, a cell may, in the course of untold millions of years, give origin to the human race.

As nine months go to the shaping an infant ripe for his birth, So many a million of ages have gone to the making of man

Let us investigate more closely this property common to animal and plant, this power of producing its likeness, this chain of successive existences of individuals, which constitutes the real existence of the species.

For my part, I hold it equally impossible for a small shellfish to be produced without generation as for a whale to have its origin from the mud.

Every few years we disappear, Zoey. All our cells are replaced by others. Not a single bit of me is the same as when I was last in this room.

Death is woven in with the violets,” said Louis. “Death and again death.”)

When is a cell finally too small to hold our essence?

The cell never acts; it reacts.

It was a reaction from the old idea of "protoplasm", a name which was a mere repository of ignorance.

A cell is regarded as the true biological atom.

To defy heredity is to defy billions of years, to defy the first cell

The greatest marvel is not in the individual. It is in the succession, in the renewal and in the duration of the species that Nature would seem quite inconceivable. This power of producing its likeness that resides in animals and plants, this form of unity, always subsisting and appearing eternal, this procreative virtue which is perpetually expressed without ever being destroyed, is for us a mystery which, it seems, we will never be able to fathom.

There is no clear distinction anywhere on the Earth's surface between living and nonliving matter. There is merely a hierarchy of intensity going from the 'material' environment of the rocks and the atmosphere to the living cells.

Reproduction is so primitive and fundamental a function of vital organisms that the mechanism by which it is assured is highly complex and not yet clearly understood. It is not necessarily connected with sex, nor is sex necessarily connected with reproduction.

Life and death live and die in exactly the same spot, the body. It is from there that both babies and cancers are born.