When pollen lands on a compatible pistil or female cone ( i. e., when pollination has occurred ), it germinates and produces a pollen tube that transfers the sperm to the ovule ( or female gametophyte ).

When ( as is almost always the case ) the sperm and eggs are produced in different kinds of gametangia, the sperm-producing ones are called antheridia ( singular antheridium ) and the egg-producing ones archegonia ( singular archegonium ). Gametophyte of Pellia epiphylla with sporophytes growing from the remains of archegonia.

When the boreoeutherian mammals then diversified into forms that were larger and / or did not require intense sperm competition they still produced enzymes that operated best at cooler temperatures and had to keep their testes outside the body.

When the vasectomy is complete, sperm cannot exit the body through the penis.

When two eggs are independently fertilized by two different sperm cells, fraternal twins result.

When a pair starts slowing down the male will put his tail under the female's body and release it's sperm that is mixed with the eggs due to the tail movement.

When the nematode C. elegans egg is fertilized the sperm delivers a pair of centrioles.

When using intrauterine insemination ( IUI ), the sperm must have been “ washed ” in a laboratory and concentrated in Hams F10 media without L-glutamine, warmed to 37C.

When an ovum is released, semen provided by the woman's male partner, or by a sperm donor, is inserted into the woman's vagina or uterus.

When the male ejaculates, sperm deposited this way will quickly swim into the cervix and toward the fallopian tubes where an ovum recently released by the ovary ( s ) hopefully awaits fertilization.

When a male is mature, he spins a sperm web, deposits semen on it, and charges his palpi with the sperm.

When they are ready to reproduce, the adults are released from the host, and sperm from the males penetrates the bodies of the females to achieve internal fertilisation.

When using intracytoplasmic sperm injection ( ICSI ) for IVF, the implantation rate is higher in oocytes injected with spermatozoa that have undergone acrosome reaction (~ 40 %) vs. those injected with nonreacted spermatozoa (~ 10 %).

When this happens, the sperm and egg cell fuse to form a zygote, the cell from which the sporophyte stage of the life cycle will develop.

" When 41 sperm whales beached nearby in 1979, state parks officials burned and buried them.

When a male has " good sperm " he is able to father more viable offspring than males that do not have the " good sperm " genes.

When a woman's insides come into contact with a man's sperm, they are coming into contact with the essence of their energy and are affected by this for several years.

When fertilization takes place, the male leaves enough sperm in the female to fertilize all the eggs in the female's ovaries.

When a capacitated sperm reaches the ovum, it is able to penetrate this layer with the assistance of hyaluronidase enzymes present on the surface of the sperm.

When it comes to sperm, then the female glues the eggs, only a few in number, to the chosen substrate and then ( sometimes ) quickly touches them with her mouth.

When the intended parents are unable to produce either sperm, egg, or embryo, the surrogate mother can carry a donated embryo ( often from other couples who have completed IVF that have leftover embryo's ).

When A bubble breaks, there's nothing.

When the ball crosses the plate the runner breaks for second base, and is essentially stealing the base on the middle infielders who have not covered second base.

When the Avengers and the New Avengers are fighting Skadi, the Serpent ends up joining the battle and breaks Captain America's shield with his bare hands.

When " Light breaks where no sun shines " appeared in The Listener in 1934, it caught the attention of three senior figures in literary London, T. S. Eliot, Geoffrey Grigson and Stephen Spender.

When blood glucose levels fall below a certain level, the body begins to use stored sugar as an energy source through glycogenolysis, which breaks down the glycogen stored in the liver and muscles into glucose, which can then be utilized as an energy source.

When she comes to the battlefield she chants a poem, and immediately the battle breaks and the Fomorians are driven into the sea.

When a heavy atom undergoes nuclear fission it breaks into two or more fission fragments.

When an electric current is passed through the coil it generates a magnetic field that activates the armature, and the consequent movement of the movable contact ( s ) either makes or breaks ( depending upon construction ) a connection with a fixed contact.

When morning breaks, Kambei orders his forces to allow the remaining bandits in.

When Henry learned how she had been treated, he breaks with his father and tells Catherine he still wants to marry her despite his father's disapproval.

When Judson advances on Warden with the knife, Warden breaks a beer bottle in two and uses the jagged edge as a weapon.

When basalt erupts underwater or flows into the sea, contact with the water quenches the surface and the lava forms a distinctive pillow shape, through which the hot lava breaks to form another pillow.

When a shark dies, the decomposing skeleton breaks up, scattering the apatite prisms.

* When the Antarctic ozone hole breaks up, the ozone-depleted air drifts out into nearby areas.

When cooked or stored at high temperatures, aspartame breaks down into its constituent amino acids.

When World War I breaks out, Chips, who had retired the year before at age 65, agrees to come out of retirement to fill in for the various masters who have entered military service.

* When the Frankenstein Monster breaks free of his bonds on the operating table in the climactic chase / fight scene, one of his neck electrodes clearly pulls off of his neck.

When the chicks and the female are too big to fit in the nest, the mother breaks out, then both parents feed the chicks.

When a river breaks its banks and floods, it leaves behind layers of rock and mud.

* When a mutiny breaks out amongst the troops who are fortifying Piraeus ( the harbour for Athens ), the Council sends Theramenes to quell it.

When he tries to bar the eponymous hero of the opera Siegfried from awakening Brünnhilde from her magic sleep, Siegfried breaks the spear in two and Wotan flees.

When she refuses, he uses force: he breaks her concentration and terrifies her by throwing her out of the airplane, catching her with the airplane, and he uses this to kiss her.

When the distance between the two electrodes is reduced, the intensity of the electric field in the volume between the electrodes becomes greater than the strength of the dielectric ( at least in some point ( s )), which breaks, allowing current to flow between the two electrodes.

When Sam invites her on a date to a baseball game, Tess inadvertently breaks the " men only " atmosphere of the press box, and is initially confused and unfamiliar with the rules of the sport, before enjoying herself and befriending other spectators.