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Q. What kind of exoskeleton do some molluscs present?
Some molluscs, like gastropods and bivalves secrete an external calcareous carapace (the shell). Calcium carbonate is a fold in the epidermis, secreted by the mantle, forming the shell.
In pelecypods, the shell is made of two valves that contain and articulate the individual body within. In gastropods the shell contains only part of the body the visceral mass.
Septa prevent oxygenated and deoxygenated blood. Give reason
Q. What are the two main species of taenias that cause human diseases? The two chief species of taenias that cause disease in humans are Taenia solium, or the pork tapeworm, an
The metaboilc changes would depend on the following factors: a) Nature of infection b) Severity of the infection c) Duration of the infection d) Presence or abse
How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.
differentiate between scanning electron microscope and a transmission electron microscope in terms of their functions
Endoplasmic reticulum (ER) is the network of membranous tubules in the cytoplasm of a cell; involved in production of the phospholipids, proteins, and the other functions. Rough E
What is the role of primary consumers in a food chain? Give an example of a primary consumer in a terrestrial and an aquatic ecosystem.
which area of the basal nuclei is responsible for controlling appendicular muscle tone?
Q. What is meant by "mutualist exploration of cellulose digestion", a phenomenon that occurs in some mammals and insects? Herbivorous animals eat great amounts of cellulose a s
Neurosurgery An antistaphylococcal antibiotic can decrease the incidence of infection after craniotomy. In spinal surgery, the infection rate after conventional lumbar discecto
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