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Biology

Biology
What prevents food from entering the windpipe?

Larynx
Trachea
Pharynx
Epiglottis

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Biology
Mitosis cannot take place bacteria because they lack ________

Nucleus
Centrosome
Chromosomes
Mesosomes

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Biology
If CO2 concentration in the blood increases, the breathing will

Increase
Decrease
No effect
Stop

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Biology
Movement of cell against concentration gradient is called

passive transport
osmosis
diffusion
active transport

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Biology
Which tissue makes the plant hard and stiff?

Xylem
Parenchyma
Collenchyma
Sclerenchyma

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Biology
In Carbohydrates the ratio of hydrogen to oxygen is

None of these
0.084027777777778
0.086111111111111
0.04375

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