TMA1/BIO405

TMA: TMA1/BIO405

SCORE=9.50

BIO405 - Hydrobiology

Mr. Adams Abiodun (aadams@noun.edu.ng )

1 From the perspective of a hydrobiologist, life on earth depends on air chemicals water soil 2 The science of life and life processes in water is called Pedology Paeleontology Hydromorphism Hydrobiology 3 Many organisms including the great majority of higher plants and most mammals must have access to ------------ to live salt water mud water fresh water brackish water 4 The one distinguishing aspect of hydrobiology is that all relate to terrestrial organisms aquatic organisms arboreal organisms aquatic and terrestrial organisms 5 Which of the following is generally described as water with low salinity? Saltwater Freshwater Brackish water Soda water 6 Which of these is divided into lentic and lotic waters ? Saltwater Freshwater Brackish water Soda water 7 Which of these is classifiedas a fresh water ecosystem? Island Upland Dryland Wetland 8 Ponds, Lakes and Swamps are examples of Wetlands Islands Lentic ecosysytems Lotic ecosystems 9 The freshwater habitat is filled with different types of plants and animals that make the ------- and ------- of the system flora and lotic flora and lentic flora and upland flora and fauna 10 In freshwater ecosystem, autotrophic organisms are producers that generate from inorganic material chemosynthetic materials photosynthetic materials inorganic compounds organic compounds 11 The most important autotrophic organisms in aquatic environments are the fungi algae protozoa mosses 12 Plants, or macrophytes, in freshwater systems live in both the benthic and ------- zones pedontic pedantic pedology pelagic 13 Benthic organisms can be divided into three distinct communities except Infauna Epifauna Dermasal Dermattol 14 Which of the following benthic communities includes some of the most economically valuable fish? Demersal Epifaunal Infaunal Non of the options 15 Which of the following benthic communities are considered to be inhabited or refered to as "Just Worms"? Demersal Dermattol Epifaunal Infaunal 16 Which of the following are among the most important components of estuarine ecosystems and may represent the largest standing stock of organic carbon in the sea? Benthic vertebrates Flora vertebrates Benthic invertebrates non of the options 17 The process of converting solar energy and storing the chemical energy (in form of food) by green plants is called tetiary production secondary production primary production non of the options 18 The energy that is used in every aquatic ecosystem ultimately comes from the sun in formof kinetic energy chemicl energy potential energy solar energy 19 Within a lake or pond, the potential rate of photosynthesis generally --------- with depth due to light attenuation increases decreases remain constant non of the options 20 The principal photosynthesizers in ponds and lakes are the protozoans fungi mosses algae