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Biology

Biology
Which of the following gas is necessary for the process of photosynthesis?

O2
CO2
N2
CO

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Biology
Which cell division of phase of cell division maintains the chromosomes number constant from generation to generation?

Mitosis
Prophase I
Meiosis
Zygotene

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Biology
Movements due to light are shown by

all land plants
all the plants
flowering plants
lower plants

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Biology
Which of the following vitamins acts like hormone?

Vitamin A
Vitamin B
Vitamin C
Vitamin D

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Biology
Gymnosperms are characterized by the

Absence of seeds
Absence of vascular tissues
Presence of flowers
Presence of seeds in cones

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Biology
Which one of the following is the correct sequence in the order of decreasing length of the structural parts given below of small intestine in the human body?

Jejunum-Duodenum-Jejunum
Ileum-Duodenum-Jejunum
Jejunum-Ileum-Duodenum
Ileum-Jejunum-Duodenum

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