Sentences with phrase «from tadpoles»

From tadpoles to frogs, from poetry to pesticides, Education World provides lessons about the issue — and issues — of spring.

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The study consisted of an experiment developed in the Centre for Environmental Biology in Grândola (Portugal), where the larvae of the five populations were raised from tadpoles to metamorphosis in the presence or absence of the red swamp crayfish.

We transform from tadpoles to apes in six weeks.

From tadpole to chimps and then to human beings?

1962 John Gurdon removes the nucleus from the egg cell of a frog and replaces it with a nucleus of a mature cell from a tadpole.

In its place, he inserted the nucleus of a mature cell taken from another tadpole's intestine.

The leopard frog leaps from tadpole adolescence to four - legged adulthood thanks to thyroid hormone, making it a natural model for studying the thyroid - brain connection.

With permission, collect frog eggs or tadpoles from a pond, along with some pond water, and observe their transformation from tadpole to frog.

Not exact matches

It is a relatively minor matter whether God infused the transcendent capacity into a freshly made creature or an upwardly mobile hominid that had evolved through various transformations, from an amoeba to a tadpole to an assortment of amphibians and mammals until, as in the familiar diagrams and animations, it looks more or less like Carl Sagan.

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The male and female pair in a lifelong monogamous relationship, and both parents share extended tadpole - rearing responsibilities in a quiet subdivision away from the perils of the Peruvian rainforest floor.

At this time, the embryo begins to lengthen and take on the appearance of a tadpole thanks, in part, to the development of the all - important neural tube that runs from the top to the bottom of the embryo.

Babies and toddlers are always in need of more snapsuits and tees, so designs from Trendy Tadpole make a fashionable and practical gift.

Perhaps the most astonishing stage of pregnancy is that of the embryonic development as your unborn child goes from being the size of a sesame seed and looking like a tadpole to being the size of a kidney bean with some neck definition and tiny webbed fingers and toes.

However, cannibals did not grow as fast as tadpoles that were fed a protein - rich mixture of brine shrimp, suggesting that the cannibal diet was far from ideal.

I stood quietly and watched as hundreds of conspicuously larger tadpoles crisscrossed the pond, making frequent excursions from the deeper water toward the shore in a relentless search for prey.

Over a three - day period, I watched and captured tadpoles in bodies of water that ranged from tire - carved puddles to bovine swimmin» holes of the double - wide Olympic variety.

Co-orbital bodies that orbit the Sun in the same direction as a planet can follow trajectories (blue curves with arrows) that, from the perspective of the planet, look like tadpoles, horseshoes or «quasi-satellites.»

This, Moore says, would help the tadpoles sprint faster to escape from hungry snakes.

Now, developmental endocrinologist Tyrone Hayes and colleagues at the University of California, Berkeley, have raised tadpoles of the African clawed frog, Xenopus laevis — the lab rat of the amphibian world — in water with levels of atrazine varying from 0.01 to 200 parts per billion (ppb).

Students from Riebli Elementary and Mark West Charter School in California examine whether Triops longicaudatus, or tadpole shrimp, could be grown in microgravity as a food source for long - term missions.

Their transformation from egg to tadpole to adult is rapid, and it's visible to the naked eye.

The problem, however, is that if they hatch early the tadpoles are less well developed, and are more vulnerable to attack from shrimps and fish.

Tadpoles from six countries across three continents were tested for «protists» — single celled microbes with complex cells which store their DNA in a nucleus, like human cells.

Upon her touch, tadpoles exploded from the tiny gelatinous water balloons and squirmed across her skin.

«Rapid transformation turns clinging tadpoles into digging adult frogs: Indian Purple frog skeleton changes dramatically to adapt from clinging to digging.»

Like living things, robotic tadpoles called Tadros evolve, changing from generation to generation in response to a form of survival - of - the - fittest selection.

The Indian Purple frog skeleton undergoes dramatic transformation as tadpoles clinging to underwater rocks become adults digging their way underground, according to a study published March 30, 2016 in the open - access journal PLOS ONE by Gayani Senevirathne from the University of Peradeniya, Sri Lanka, and colleagues.

Prof Perissinotto and his NMMU colleague Dr Matthew Bird, together with water beetle specialist Prof David Bilton (Plymouth University), collected specimens ranging from 1 mm to almost 5 cm in length (the tadpole eaters).

The new species seems to prefer to give birth to tadpoles in small pools or seeps located away from streams, possibly to avoid the heftier fanged frogs hanging out around the stream.

Tadpoles of the Cascades frog prefer to associate with siblings, which they distinguish from nonsiblings.

When they created MR images of the tadpoles that grew from these embryos, bright spots indicated where the enzyme was active — in half the animal — and the spots correlated closely with standard stains of enzyme activity done by sectioning the tadpole, they report in the March Nature Biotechnology.

Wood frog tadpoles, for example, received as much as 70 % of their nitrogen from septic wastewater in some cases.

The researchers also found that wood frog tadpoles shifted their diet from mainly fallen leaves in forested ponds to mainly algae in suburban ponds, indicating a transformed food web.

Because of this lapse, WatchFrog is targeting its tests to OECD guidelines, which define hormone disruptors as chemicals that can disrupt the ability of a fish to produce eggs or change sex or prevent a tadpole from metamorphosing.

«The light elements that makes up these «molecular tadpoles» are easily located by neutrons» says Dr Isabelle Grillo, at the ILL. «Moreover, small angle neutron scattering which we use at the ILL allows to characterise the self - assembled systems from the nanometre scale to tenth of micrometres and is perfectly adapted to observe the coming together of the C60 footballs» into these beautiful core structures.»

«We have now studied the tissues from fish, frogs, and tadpoles, hair from mammals, feathers from birds, and ink from octopus and squids,» said Caitlin Colleary of Los Angeles, California, a doctoral student of geosciences in the College of Science at Virginia Tech and lead author of the study.

Researchers removed an eye from one tadpole's head and attached it to the skin of another.

For their latest study, they removed the left eye from one tadpole and attached it near the tail of another tadpole.

The researchers were surprised to learn that road salt caused a change of sex, from female to male, in tadpoles — the opposite of the feminization effect sometimes seen as

The researchers were surprised to learn that road salt caused a change of sex, from female to male, in tadpoles — the opposite of the feminization effect sometimes seen as pharmaceutical pollutants affect waterways.

The tadpole - attractant can be made from the poison secreted by adult toads, and we are zeroing in on the suppression pheromone in our current studies.

Dr Michael Crossland from TEAM BUFO has found a powerful tadpole attractant substance, and if put into a funnel trap it works well to catch tadpoles from natural ponds.

However, they rarely try to eat live toad tadpoles, so the big poisoning risk to native tadpoles is from toad eggs not toad tadpoles.

For example, does a tadpole's exposure to chemicals (scents) from predators affect the way it develops?

Michael was the person who discovered that a chemical in toad eggs attracts cannibalistic toad tadpoles - and the person who ended up identifying the exact nature of that chemical (in collaboration with other members of TEAM BUFO, especially Professor Rob Capon from the University of Queensland).

The same is true for our tadpole trapping - the tadpoles of native frogs are repelled by our «bait» (the poison from cane toads) whereas cane toad tadpoles are strongly attracted.