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Q. Do echinoderms have an excretory system? How is excretion done in these animals?
Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
Question 1: (a) Describe the maturity stages in fish. (b) "k" and "r" selection strategies are commonly used to describe the response of fish to biotic and abiotic cond
What are primary consumers? Can a food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secon
GONADS - They develop from the mesoderm of the embryo. The gonads are the sex glands; the ovaries and the testes. They produce ova and sperms respectively i.e. cytogenic in
Which of the following is a false statement regarding prokaryotic and eukaryotic core promoters? A. The core promoters of eukaryotic genes have more recognition elements for ge
Are organic solvents like benzene and ether polar or non-polar substances? Benzene and the ethers are molecules without electrically charged portions and therefore they are non
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Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations.
Diastolic dysfunction is responsible for one third of cases of heart failure alone and rest two third of cases in combination with systolic dysfunction. Diastolic dysfunction c
describe the discovery of new fossil evidence for evolution
In the scientific competition against fixism what are the main arguments that favor evolutionism? The major arguments in favor of evolutionism are: paleontological, from the st
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