Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What are the problems that vertebrates needed to solve to adapt to the terrestrial environment since they came from the aquatic habitat? How evolution does solve those problems?
The main problems vertebrates coming from water needed to solve to adapt to the terrestrial environment were the following: the problem of elimination of wastes in a medium where water is less available, the problem of protection against nocent solar radiation, the problem to avoid dehydration, the problem of gamete locomotion in the environment for fecundation, the problem of gas exchange, earlier done by direct contact of water with gills, the problem of body support, since it was water that played this role in fishes.
Solutions for the dehydration problem: thicker and impermeable skin, permeable and moist skin or to lose less water like in amphibians. Solution for the excretion problem: excretion of urea also excreted by uric acid or chondrichthyes, substances that need less water to be dissolved. Solutions for the problem of protection against radiation: skin pigments that filter harmful radiation, feathers, carapaces or hair. Solution for the gamete movement problem: internal fecundation except for most amphibians that have external fecundation. Solution for the gas exchange problem: appearing of lungs and airways. Solution for the body support problem: further development of bony and muscular structures, like claws and limbs.
Foraminifera is the single-celled protists which secrete a shell or test. This is the accumulations of the shells of dead foraminifera and the other microscopic sea creatures form
Explain about the Paediatric and Geriatric Nutrition? Every stage has its unique requirements due to different changing needs. Adequate and optimum nutrition support is very im
where is liquid tissue found
The one aspect which is not a salient feature of genetic code, is its being: 1. Degenerate 2. Ambiguous 3. Universal 4. Specific Ambiguous
What is the thermopenetration concept? The pasteurization of products packed in glass containers leads to a problem of a specific nature, which is referred to as 'thermopenetra
Explain Total Anomalous pulmonary Venous Connection (TAPVC) ? In this congenital anomaly there is no direct communication between the pulmonary veins and the left atrium. All
Explain the molecular difference between fats and oils. How do the differences affect their physical properties?
What is a glucose tolerance test? A glucose tolerance test, usually conducted in the 24 to 28 weeks of pregnancy measures levels of sugar (glucose) in the mother's blood. Abnor
Syngamy - Protozoan The two gametes may be morphologically similar (isogametes) or dissimilar (anisogametes). The gametes also vary in form, they may be flagellated or amoeboi
Carrier ions like Na+ facilitate the absorption of substances like: 1. amino acids and glucose 2. glucose and fatty acids 3. fatty acids and glycerol 4. fructose and so
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd