Leptocardia
(Science: zoology) The lowest class of vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colourless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus.
alternative forms: Leptocardii.
Origin: NL, fr. Gr. Small – the heart.
Leptocardia (Science: zoology) The lowest class of vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colourless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus. alternative forms: Leptocardii. Origin: NL, fr. Gr. Small..
The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
The Earth's ecosphere was rapidly changing and throwing up a wide range of ecological niches that new adaptive organisms..
This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..
Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..
This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..
