Revision questions and answers for week three's habitats and physiology module.
In this quick revision, the important thing to remember is that you are aiming to pick out the specific facts relevant to the question. The final test at the end of the diploma will not be the kind of test that requires hundreds of words — no part of it runs as an essay. Instead, it will be conducted in the form of multiple-choice answers to a series of questions.
The layout below is a selection of practice questions, each of which probe your knowledge on the module you have just covered. Though they’re not laid out as multiple-choice questions and answers, they are designed to stimulate your mind to re-explore some of the main areas you’ll be tested on.
1) Roughly what percentage of all freshwater on Earth is found in all rivers and lakes combined?
2) What is brackish water?
3) What is the term used for a habitat that contains still or very slow water, like a lake or pond?
4) What will happen to the chemistry of rainwater that passes over calcium rich rocks?
5) Attached to which fish organ do you find the bulbus arteriosus?
6) Which fish typically have a labyrinth organ?
7) What is the correct name for the tail fin?
8) What is the function of the Weberian apparatus?
9) Which way does a terminal mouth point?
10) If a fish cannot osmoregulate properly, what usually happens to it?
11) What is the correct term for most livebearing fish such as guppies?
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Answers
1) 0.01% of all freshwater on Earth is found in all rivers and lakes combined.
2) Brackish water is a mixture of fresh and salt water.
3) A habitat that contains still or very slow flowing water is known as a lentic habitat.
4) Calcium rich will increase hardness in rainwater that passes over it.
5) The bulbus arteriosus is attached the heart of a fish.
6) Anabantoid fish typically have labyrinth organs.
7) The correct name for the tail fin is the caudal fin.
8) The function of the Weberian apparatus is sound detection.
9) A terminal mouth points directly forwards from the fish.
10) If a fish cannot osmoregulate properly, it is unable to regulate mineral and fluid content and usually dies.
11) The correct term for most livebearing fish such as guppies is ovoviviparous.