The diagram below shows an organism called Euglena.It is made of only one cell. It lives
in ponds and streams. Euglena have features of both plants and animals
(a) Look at the diagram of Euglena. [2m]
Give two pieces of evidence which suggest it is an animal cell and not a plant cell.
1._____________________________________________________
2._____________________________________________________
(b) Plant cells can carry out photosynthesis. [1m]
How can you tell from the diagram that Euglena can carry out photosynthesis?
________________________________________________________________
Answers
Answer:
a. pieces of evidence which suggest it is an animal cell and not a plant cell -
1. All living things are made up of cells. Cells are the basic unit of a living organism and where all life processes are carried out.
2. Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.
3. Plant cells have three extra components, a vacuole, chloroplast and a cell wall.
b.
Euglenas create their own food through photosynthesis, the process of absorbing sunlight to synthesize foods from carbon dioxide and water. An eyespot at the front end of the euglena detects light, and its chloroplasts (structures that contain chlorophyll) trap the sunlight, allowing photosynthesis to occur.
Answer:
Euglena has chloroplast. Chloroplast contains chlorophyll which is required for photosynthesis. Chlorophyll traps sunlight during photosynthesis.
Explanation:
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