831. Which of the following induces souring of milk?

1. Acetic Acid
2. Citric Acid
3. Ascorbic Acid
4. Lactic Acid

Option “4” is correct
Milk contains a sugar called lactose. It also contains harmless bacteria called lactobacillus, which uses lactose for energy and creates lactic acid as a by-product. It is the lactic acid which makes milk taste sour.
832. Which non-flowering, spore bearing plants have roots?

1. Mustard
2. Angiosperms
3. Ferns
4. Gymnosperms

Option “3” is correct
Ferns are non-flowering, deciduous or evergreen perennial plants that grow in various sizes having roots. The fern’s life cycle continues when spores germinate in sunlit, moist environments.
833. Which is the largest living bird on Earth?

1. Emu
2. Ostrich
3. Albatross
4. Siberian crane

Option “2” is correct

The Ostrich is the largest living species of bird in the world. It is unique in its appearance, with a long neck and legs and it can run at maximum speeds of about 70 km/h or 43 mph.
834. Blood groups were discovered by –

1. Almann
2. Landsteiner
3. Losch
4. Ronald Ross

Option “2” is correct
Blood groups were discovered by Karl Landsteiner.
835. Transport of oxygen by blood takes place with the help of –

1. Hemoglobin
2. Thrombocytes
3. Lymphocytes
4. Leucocytes

Option “1” is correct

The majority of oxygen in the body is transported by hemoglobin, which is found inside red blood cells.
836. In the human body, fats are stored in the –

1. Epidermis
2. Adipocytes
3. Liver
4. Epithelium

Option “2” is correct
Fats are stored in fat cells known as adipocytes.
837. Stem cells which capable of developing into other types of cells come from the –

1. Roots
2. Stem
3. Embryo
4. Flower

Option “3” is correct
Stem cell comes from embryo.
838. The book ‘Genera Plantarium’ was written by –

1. Linnaeus
2. Bentham and Hooker
3. Engler and Prantle
4. Hutchinson

Option “1” is correct
Genera Plantarium’ was written by Carl Linnaeous.
839. Which among the following is a main constituent of Histosols?

1. Acidic Salts
2. Organic Matter
3. Minerals
4. Clay Content

Option “2” is correct
Organic matter
840. Term Vitamin was coined by –

1. Charles Levaran
2. Casimir Funk
3. Robert koch
4. Robert hooke

Option “2” is correct

The term Vitamin was coined by Casimir Funk.
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48 thoughts on “Biology”

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