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Q. Which is the kind of muscle tissue that helps to push the food down through the esophagus?
The esophageal wall in its superior portion is made of skeletal striated muscle the inferior portion is made of smooth muscle in the intermediate portion there are skeletal smooth and striated muscles all of these muscles are important to push the food down towards the stomach.
What is the most abundant form under which nitrogen is found in nature? The most abundant nitrogen-containing molecule found in nature is molecular nitrogen (N2). The air is 80
A charged particle A exerts a force of 2.39uN to the right on charged particle B when the particles are 12.3 mm apart. Particle B moves straight away from A to make the distance be
What do biomass pyramids represent? Biomass pyramids show the sum of the masses of the individuals that participate in each trophic level of a food chain.
a) What is the special property of a 'persistent' insecticide? b) In what ways is 'persistence' (i) a useful property, (ii) a harmful property? (a) A persisten
How many different types of gametes can be formed by individuals of the following genotypes? What are they in each case a) AaBb b) AaBB c) AaBbCc d) AaBBCc e) AaBbcc f) AaBbCcDdEe
what are protein? What is the constituential uni. Of protein? Briefly explain the various forms of protein?
Please help with the following: a) Draw a diagram (showing all the C and H atoms, and their bonds) for a hydrocarbon with 5 carbons with a double bond between carbons 2 and 3.
Nature defences against viral infections 1. Interferons - In 1957 Issue and Lindenmann discovered that vertebrate cells infected with viruses, produce a diffusible antiv
Spinal cord Spinal cord is a long and cylindrical structure. It passes through the vertebral column extending all along the dorsal surface of trunk. Vertebrae of the v
Which hormones stimulate glycogenolysis? Glucagon in liver and epinephrine in liver and muscle stimulate glycogenolysis.
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