Sometimes it’s easy to tell if something is living or not. A teddy bear might look like a bear, but it cannot do any of the seven things it needs to be able to do to count as being alive.

Take the evolution of sex, for instance. To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply by dividing (asexual reproduction ...

In most multicellular organisms, meiosis is restricted to germ cells that are set aside in early development. The germ cells reside in specialized environments provided by the gonads, or sex organs.

Both cells are essential components of the process ... Implications for the future of reproduction By simulating the microenvironment of mouse testes, the researchers aimed to create optimal ...

How sexual reproduction came about has long been a mystery, but an evolutionary model suggests it could have started with ...

Researchers at the Francis Crick Institute have found that the small intestine grows in response to pregnancy in mice. This ...

Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures that when a cell divides each new cell produced has the same genetic information.

Researchers at the Francis Crick Institute have found that the small intestine grows in response to pregnancy in mice. This partially irreversible change may help mice support a pregnancy and prepare ...

Pregnancy permanently lengthens the small intestine in mice, enhancing nutrient absorption for mother and offspring. Genetic ...

Take the evolution of sex, for instance. To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply by dividing (asexual reproduction ...

Researchers at the Francis Crick Institute have found that the small intestine grows in response to pregnancy in mice. This ...