State three features of plant cells that are not found in animal cells?
Sign in and upgrade to Premium to write and mark your own answer.
chloroplasts; cellulose cell wall; large permanent vacuole
Variety Of Living Organisms
Give one example of a cereal plant and one example of a herbaceous legume?
Sign in and upgrade to Premium to write and mark your own answer.
cereal — maize; legume — peas / beans
Describe two features of animal cells that distinguish them from plant cells?
Sign in and upgrade to Premium to write and mark your own answer.
animal cells have no chloroplasts so cannot photosynthesise; animal cells have no cell wall
State the storage carbohydrate found in most animals?
Sign in and upgrade to Premium to write and mark your own answer.
glycogen
Define the term saprotrophic nutrition?
Sign in and upgrade to Premium to write and mark your own answer.
the organism secretes digestive enzymes externally onto food material; and absorbs the soluble organic products
Distinguish between the cell wall material found in plants and in fungi?
Sign in and upgrade to Premium to write and mark your own answer.
plant cell walls are made of cellulose; fungal cell walls are made of chitin
Give one example of a single-celled fungus?
Sign in and upgrade to Premium to write and mark your own answer.
yeast
State one feature of Chlorella that makes it similar to a plant cell?
Sign in and upgrade to Premium to write and mark your own answer.
it contains chloroplasts / can carry out photosynthesis
Identify the protoctist that causes malaria?
Sign in and upgrade to Premium to write and mark your own answer.
Plasmodium
Explain why Amoeba is described as having animal-like features?
Sign in and upgrade to Premium to write and mark your own answer.
Amoeba has no cell wall; and has no chloroplasts / cannot photosynthesise
Describe two features of bacterial cells that are not found in animal cells?
Sign in and upgrade to Premium to write and mark your own answer.
bacterial cells have a cell wall; bacterial cells contain plasmids
Explain why bacteria are classified as prokaryotic organisms?
Sign in and upgrade to Premium to write and mark your own answer.
bacteria have no true nucleus / no nuclear membrane; their DNA is a circular chromosome free in the cytoplasm
Give one example of a bacterium used in food production and state its role?
Sign in and upgrade to Premium to write and mark your own answer.
Lactobacillus bulgaricus; used in the production of yoghurt from milk
Define the term pathogen?
Sign in and upgrade to Premium to write and mark your own answer.
an organism / agent that causes disease; examples include fungi, bacteria, protoctists or viruses
Explain why viruses are not classified as living organisms?
Sign in and upgrade to Premium to write and mark your own answer.
viruses have no cellular structure; they cannot reproduce on their own / can only reproduce inside living cells; they do not carry out metabolic reactions
Describe how the tobacco mosaic virus affects tobacco plants?
Sign in and upgrade to Premium to write and mark your own answer.
it prevents the formation of chloroplasts in leaf cells; which causes discolouring of the leaves
State the type of nucleic acid found in a virus?
Sign in and upgrade to Premium to write and mark your own answer.
either DNA or RNA (not both)