Question

1. Give an example of a primary producer that you observed in the pond water. What does it do to be called a primary producer (hint – think sun)?

2. Read about pond microorganisms, and describe their importance in a pond (including bacteria), what would happen if all microorganisms would suddenly disappear from the pond.

3. Give and describe some examples of pond microbes with their images. (at least 5 microbes) Be sure that their images are magnified (microscope).

4. Protists were around before the first ___________________ and ________________ . Fossil protists have been found in rocks that are _________ billion years old. Protists are _____________celled organisms that have both ________________ and _____________ characteristics. Protists with plant-like characteristics are called ___________________ . Animal like protists are called ____________________________________________.

Answer 1

Answer: 1) In pond water phytoplanktons and algae are found as primary producers. These make food by the process of photosynthesis using energy from sun. other organisms depend on them for food and oxygen released during photosynthesis. 2). Microorganisms in a pond include phytoplanktons, zooplanktons, bacteria, algae which depend on each other forming a food chain. Phytoplanktons act as a source of food for other aquatic organisms in the pond. Algae also play the same role. matter organic decompose in present Bactena pond into simple compounds and minerals utilised by other microbes. o conic matter by otaple

Bacteria are also responsible for nitrogen fixation. of all micro sogani sms Suddenly disappear from the pond, food chain and sustainence of life cannot be maintained due to deficieny of oxygen and food. 37 Examples of pond microbes : Chlamy domonas . Euglena • Diatoms desmids . Nostoc 4. Protists were around before the fisst origin of mammal like reptiles and insects Protists are one belled organisms that have and organelles and both nuclear membrane both plant like and animal like Characteristics plant like boksts with are characteristics called Phytoplanktons. Animal like protests are called Zooplanktons