Some marine flatworms
, such as acoels and polyclads, and freshwater rhabdocoels are planctonic (Hyman, 1951; Rocha et al.
Professor Hoffmann said: "We are incredibly pleased that the Wellcome Trust has selected our team to develop these cutting-edge resources, which will revolutionise our ability to study and manipulate parasitic flatworms
including blood flukes and tapeworms.
Thompson and McConnell realised that if the theory was correct, the simplest creatures it might work for would be flatworms
, so they first set up a simple conditioning experiment to see if worms could be taught anything.
A terrestrial flatworm
well established outdoors in the northeastern United States.
Choose two parasitic flatworms
that we've read about or studied online, comparing their life cycles.
(Koopowitz, 1974), and mollusks (Bristol and Carew, 2005) have been shown to habituate to irrelevant stimuli.
I am gratified to report that Democratic members of Congress have demonstrated that they are actually smarter than flatworms
Planarians, a type of flatworm
, are the lowest form of life that possesses an integrated neural network organized in a manner that many consider to represent the earliest brain.
The historically large volume, steady flow, and warm temperature (74[degrees]F or 23[degrees]C) of the Comal River created habitat for the fountain darter and, unfortunately, a non-native snail, the red-rimmed melania (Melanoides tuberculatus), and its accompanying parasitic trematode or flatworm
Tiny grey flatworm
same shape as stem segment of Christmas cactus.
And while it may be possible to detach a cell or a group of cells at an early stage to form two (or more) distinct organisms, such a procedure fails to show that before detachment the cells of the embryo only constitute an incidental mass: as a flatworm
is a unitary individual before dividing into two whole flatworms
, so, too, is the embryo.
And we developed two assessments that required three class periods to complete: a study of melting ice cubes and a study of flatworm