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Science - 7th grade - Lesson 3 (review)
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What is the function of the vacuoles?
It stores water, food or other materials needed by the cell.
Does chloroplast exist in plants cells? Does it exist in animal cells?
It exists only in plants cell.
Which cell structure can be compared to a gel?
Cytoplasm!
What is the function of the nucleus?
It acts directing all of the cell's activities.
Which cell structure can be compared with the brain?
The nucleus.
True or false: All cells have cell membrane.
True :)
What is the function of cell membrane?
It controls which substances pass into an out of the cell.
True or false: All animal cells have cell wall.
False. Only cells of plants have cell wall.
What is a cell?
the smallest structural and functional unit of an organism.
Name the seven levels of classification
From the smallest to the biggest: species, genus, family, order, class, phylum and kingdom.
What is the scientific name of brown bear?
Ursus arctos.
What is the scientific name of polar bear?
Ursus maritimus.
True or false: each species receive a three part scientific name.
False. It receives a two-part name.
What does classification mean?
It means grouping things based on their similarities.
Which famous scientist was reponsible for creating the system called binomial nomenclature.
Carolus Linnaeus