Narwhals are difficult to keep in captivity.

T cell killing of host cells is particularly important in preventing the replication of viruses.

It's just that the dust bunnies are breeding ferociously.

Cloning is a controversial method of reproducing organisms.

So I don't think, honestly, we're an animal that was built to be happy we are an animal that was built to reproduce.

It most definitely doesn't mean that our men are kept primarily for breeding stock and procreation.

They're using you and me as their propagating, copying machinery, and we are the meme machines.

For rare animals with specific reproduction sites, like marine turtles, the tsunami s effects could spell extinction.

Scientists are developing fences that keep the toads away from breeding grounds and chemicals that trap the tadpoles.

Langtang National Park closed for Red Panda's breeding season _BAR_ http t.co 97BzDbEjxe http t.co OoPKKnXb4B myRepública ( RepublicaNepal) July 8, 2015

Elephant Conservation Center differentiates itself from elephant tourist camps by being a haven for elephant reproduction, lactation, convalescence and disease diagnosis.

Indeed, we still lack substantial information on how our bodies metabolize them and how they interact with one another.

Nor are they subjected to the same rigorous toxicity studies as other pharmaceutical agents.

Political instability, a fragile law and order situation, frail institutions and sociopolitical polarisation make the country a breeding ground for violent elements.

For some new agents, it is fair to ask whether they truly represent an advance over previously available (less expensive) alternatives. For novel agents, such as the anti HER2 antibody Herceptin , where there is no precedent, this cost must be considered against its novel action, activity, and limited toxicity.

For novel agents, such as the anti HER2 antibody Herceptin , where there is no precedent, this cost must be considered against its novel action, activity, and limited toxicity.

It's an accelerated view, where you can see the robot actually carrying out some of its replication process.

But it's hard to solve the problem of reproduction directly in space.

Even solitary sharks meet for breeding or at rich hunting grounds, which may lead them to cover thousands of miles in a year.

During the breeding season they are territorial and usually remain on their territory all the time.

By the end of the 19th century, viruses were defined in terms of their infectivity, their ability to be filtered, and their requirement for living hosts.

As the red panda s breeding season starts from mid June, the national park has been closed to visitors and even firewood gathering by locals has been prohibited for two months.

Research on animals is performed to gain more knowledge about diseases and how to cure them, and to evaluate drugs for toxicity before testing them on humans.

Lithium, a mood stabilizer and neuroprotective agent, has the properties we are seeking, although its toxicity makes it less than ideal.

We take them from nature, and the only thing that we do, we give them the optimal conditions, under the greenhouses or in the climate rooms, in order to proliferate, multiply and reproduce.

First, new drugs should always offer added value better efficacy, lower toxicity, or greater ease of treatment.

The response is fuelled by stress hormones that flow through the body, altering every organ and biochemical function, with wide ranging effects on metabolism, growth, and reproduction.

And it declined very fast a classic boom and bust fishery, which suggests that a stock has been depleted or there's low reproductive rates.

So the large baleen whales will produce long, beautiful songs, which are used in reproductive advertisement for male and females, both to find one another and to select a mate.

Replication Cell division is essential for an organism to grow, but, when a cell divides, it must replicate the DNA in its genome so that the two daughter cells have the same genetic information as their parent.

Tents flood when it rains and are stiflingly hot on warm days toilets, of the portable variety, are extremely unsanitary drainage systems are inadequate, with puddles of standing water providing a breeding ground for insects.

And I've also come to think that it's one of three basically different brain systems that evolved from mating and reproduction.

The survival function that SIR2 exists to serve forestalling aging and reproduction during famine is adaptive and therefore pervasive in nature.

DW No, no, actually I think they're all important to drive the right movement behavior to get reproduction in the end.

While males are generally tolerant of one another during most of the year, they can act aggressively toward each other during the breeding season.

Eugenics embodies the desire and attempts of a society's leaders to control the breeding practices of its citizens, including the forcible sterilization or murder of those deemed as carrying undesirable genes.

Toxicity can be evaluated by putting buckyballs into a fish tank, but we must also find out whether buckyballs would ever actually arrive in a real world fish tank such as a lake or river.

Well, it's because its brain had been infected with a lancet fluke that was needed to get into the belly of a sheep or a cow in order to reproduce.

Now when the Treasure sank in 2000, it was the height of the best breeding season scientists had ever recorded for the African penguin which at the time, was listed as a threatened species.

This is unavoidable for my sake, for yours, and for that of our son.

Not for school, but for life do we learn.

The alternatives for my country, for Russia, and for Europe are clear.

Not just the priests. Everybody.

Everything for others, nothing for himself!

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