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Compared to plants grown on a complete nutrient medium, plants grown without nitrates are…
A deficiency in which type of mineral ion causes plants to have yellow leaves?
Glucose is a product of photosynthesis. Which of the following statements is not a use of glucose in plants.
A market gardener uses a paraffin heater in a greenhouse to improve the yield of plants. Which one of the following is not a good explanation for the effect of the heater?
If light intensity is the limiting factor in an investigation, which of the following would not cause a change in the rate of photosynthesis?
Which one of the following is most likely to occur if an animal cell is suspended in a very weak salt solution?
A human egg cell is large compared with a human sperm cell. The best explanation for this difference is
Which one of the following is the best description of the structure of a metabolically active cell?
Which one of the following is not a characteristic of all nuclei?
The role of the cell wall is
Which of the following structures is the location of respiration reactions inside animal cells?
Which of the following structures is a location where light energy is transferred into chemical energy?
Which two of the following structures are not a part of animal cells?
A drawing of a cell on a poster is 10cm and the scale shows it to have an actual size of 0.1mm in real life. Calculate the magnification.
Where is the genetic information in a bacterial cell?
What is 6cm in nanometers?
What is the name of the structures which line the small intestine to increase surface area?
Which structure in the gills of a fish increases the surface area?
What are the pores on the underside of leaves called?
Which sub-cellular structure carries out protein synthesis?
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Organisms causing decay belong to which group?
Which of the following adaptations allows a sperm cell to swim towards the egg?
Starch is a better compound than glucose for storing energy in cells because…
Stem cell research: which of the following statements is correct?
What is the recommended temperature range for growing microorganisms in a school lab?
Which adaptations do the villi in the small intestine have to be able to absorb food?
Embryonic stem cells: which of the following statements is correct?
Which of the following are not specialized animal cells?
What do cells use to interact with one another?
Why do you need to add Iodine solution to your microscopic sample?
Why do xylem cells contain spirals of lignin?
What is the name of the plant tissue made up of undifferentiated cells?
Which cell group does not have a true nucleus?
Which of the following cannot be called a cell?
Как Се Извършва Сърдечен Масаж?
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