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Q What is the system that permits fixation and movement to echinoderms?
The system that permits fixation and movement to substrates in echinoderms is called the ambulacral system. In these animals water enters through a structure called madreporite passes through channels and reaches the ambulacral feet in the undersurface of the body. In the ambulacral region in contact with the substrate there are tube feet emptied and filled by water thus acting as suckers.
Biogeography : This is the distribution of organisms in various parts of the earth. Over periods of ecological changes, biogeography contains the study of plant or animal species i
Q. Zonation in the ocean? The oceans play a major role in determining the climate and sustaining life on earth. Oceans help to redistribute the solar energy, through ocean curr
State in detail about Dark Adaptation Dark adaptation is a phenomenon by which retina and pupil react to decreased illumination. Test is performed using Goldmann-Weeke's adapto
Double fertilization It carries two sperm cells to the female. A characteristic of angiosperms in which the pollen tube gametophyte in the ovule. The one sperm cell fuses with the
How to reproduction in human.
what is a scientific name of mango?
Male and female gametophytes are independent and free-living in: 1. Mustard 2. Castor 3. Pinus 4. Sphagnum Sphagnum
Explain about the Biofertilizers Biofertilizers, are the cultures of microorganisms used for inoculating seed or soil or both under ideal conditions to increase the availabilit
how does autophagy help in converting a tadpole larva into an adult amphibian
Caryopsis - Development of Fruit In cereals each carpel has one ovule and therefore the mature fruit has, just one seed. During maturation, very little or no cell divisions ar
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