Surname Centre Number Candidate Signature Other Names Candidate Number Leave blank General Certificate of Education June 2004 Advanced Level Examination BIOLOGY/HUMAN BIOLOGY (SPECIFICATION A) Unit 5 Inheritance‚ Evolution and Ecosystems Tuesday 22 June 2004 Morning Session No additional materials are required. You may use a calculator. BYA5 For Examiner’s Use Number 1 2 Mark Number Mark Time allowed: 1 hour 30 minutes Instructions • Use blue or black ink or ball-point pen. • Fill in the boxes
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think that phytoplankton are more indicative of oligotrophic lakes‚ where-as zooplankton are more indicative of eutrophic lakes. I think this because‚ since phytoplankton are capable of producing their own energy‚ they don’t need the nutrients that eutrophic lakes offer‚ and they would probably prefer all the sunlight in the oligotrophic lakes which they would need to photosynthesize. The opposite is true for zooplankton‚ they depend on the nutrients from eutrophic lakes and they do not enjoy sunlight
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“Asian Carp and the Effect on the Great Lakes” Statement of the Issue Asian carp are a threat to the Great Lakes if they invade them. They could destroy the Great Lakes ecosystem by overpopulating the lakes and disrupting the food chain. Asian carp are large fish that can weigh up to 100 pounds and grow to more than four feet long and will consume an excess amount of food and leave the other fish with very little to eat. With these carp in the water sport fishing will be affected along
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Henessey Gonzalez October 24‚ 2013 Shark Finning is Inhumane Every year millions of sharks die a slow and immoral death from fishermen stripping them of their fins. These fish are taken out of the ocean and then stripped of their fins where their carcasses are then thrown back into the sea to either starve to death‚ be eaten by other predators‚ or drown because of the lack of constant movement their gills cannot extract oxygen from the water which is not only cruel but unorthodox. With that said
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Sharks eat fish such as lantern fish and amphipods. These fish are the one who eat types of zooplankton and phytoplankton because zooplankton and phytoplankton produce 80% of our oxygen it is important to keep them alive. If we did not have sharks the other fish populations which will be overcrowded because sharks have been overfished‚ they will eat all the plankton
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Chapter 50 Ecology is the scientific study of the interactions between organisms and their environment. Concept 50.1 Ecology is the study of interactions between organisms and the environment Ecology and evolutionary biology are closely related sciences. * Ecology has a long history as a descriptive science. * Modern ecology is also a rigorous experimental science. * Ecology and evolutionary biology are closely related sciences. * Events that occur over ecological time (minutes
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The family Labridae‚ otherwise known as wrasses‚ is marine fish consisting of more than 575 species found in warm-temperate and tropical reefs around the globe (Wainwright et al. 2004). Of all of the coral reef fishes worldwide‚ the family Labridae is one of the most morphologically diverse (Westneat 1995). Due to their different morphologies‚ different fishes within the species prey on different types of food. The main difference making up the separate morphologies‚ and subsequently feeding habits
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and even those who seem far related. If anything change occurs in one part of an environment ‚ then the whole environment will be affected. For example if the population of plankton in a marine area goes extinct so will its consumers the zooplankton die and so will the other fish that eat the zoo plankton such as crustaceans . Marine life could not exist without plankton . Scientist often times use ecological models to help them represent parts of an ecosystem and to help them understand
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almost 20 years in Africa with mixed success; the total farm production of this species being only 3‚978 metric tonnes or 7.4% of the total farmed fish production of 69‚434 mt in Africa in 1994. To a large extent the poor performance of this freshwater fish species in Africa has been due to the absence of reliable production techniques for the reproduction and rearing of the species under practical farming conditions The document is based on the practical field experience of Gertjan de Graaf
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