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What are cnidocytes? What is the name of the capsule inside the cnidocyte? What are the biological functions of this structure?
Cnidocytes are specialized cells present in coelenterates. They are found in the epidermis and have toxic substances that can hurt, paralyze or even kill other animals.
Every cnidocyte has an internal capsule know as nematocyst where the actual urticating substance is stored. When a cnidocyte is excited it causes the nematocyst to expose a filament having the toxic chemical.
Cnidocytes and their nematocysts have the biological functions of defending the individual from external aggression and of helping to capture their prey.
Locomotion in Mollusca The major locomotor organ in Mollusca is the foot, which is a characteristic feature of these animals. In its simplest form the foot is a flit ventral
niche
Define Energy and Protein requirements in geriatric nutrition? Decreased physical activity and changes in body composition and decreased basal metabolic rate affects the ma
what is evolution
How many of each type of core histone would it take to wrap the entire human genome into nucleosomes? How has evolution solved the problem of producing such a large number of prote
A bee visits several flowers in succession on a single willow herb plant. In doing so, the bee transfers pollen from the younger flowers, near the top of the inflorescence (group o
What is the autotrophic hypothesis on the origin of life? An autotrophic hypothesis on the origin of life asserts that the first living beings on earth were producers of their
What is a test tube and how is it used? A test tube is a clear, cylindrical glass tube generally open at one end and rounded at the other, used in laboratory experimentation.
Antibody Structure: An antibody molecule consist of two alike light chains ( 220 amino acids each) ad two similar heavy chains (about 440-450 amino acids each) held together
1. Describe how the various molecular mechanisms act to regulate transcription of the genes within the lactose operon of E. coli . 2. Transcription of a eukaryotic protein-codi
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