For each of the folliwng groups of animals (marine invertebrates, marine vertebrates, fresh-water animals & land animals) describe osmosregulatory probkems they face and how they cope with them?
I think what you need can be found at the following 3 sites:
http://en.wikipedia.org/wiki/Osmoregulation
http://72.14.253.104/search?q=cache:cs721WpLCVoJ:www.cbu.edu/~esalgado/BIOL112/Campbell/ch44.doc+osmoregulation+%22land+animals%22+%22marine+animals%22&hl=en&gl=us&ct=clnk&cd=1
http://www.nmc.edu/~ftank/116s05/Ch44WordLectureOutline.htm
To answer your question about osmoregulatory problems faced by different groups of animals and how they cope with them, you can find relevant information from the following sources:
1. Osmoregulation (Wikipedia): This Wikipedia page provides a general overview of osmoregulation and how different animals maintain osmotic balance in their bodies. It covers osmoregulation in both marine and freshwater animals, as well as some land animals. The page explains the various mechanisms and adaptations animals use to cope with osmoregulatory challenges.
2. Osmoregulation document (CBU website cache): This document appears to be a lecture outline on osmoregulation from Campbell University. It includes specific information on osmoregulation in marine animals and land animals. You may find this resource helpful for understanding the specific osmoregulatory challenges and coping mechanisms of different groups of animals.
3. Ch44 Word Lecture Outline (NMC College website): This lecture outline focuses on Chapter 44 of a biology course. It likely covers osmoregulation in marine invertebrates, marine vertebrates, freshwater animals, and land animals. It may provide detailed information and examples of how each group copes with osmoregulatory problems.
By referring to these sources, you should be able to gather the necessary information to describe the osmoregulatory problems faced by each group of animals and understand how they cope with them.