Q:

The speed of a boat when travelling downstream is 32 km/h, whereas when travelling upstream it is 28 km/h. What is the speed of the boat in still water?

A) 27 km/h	B) 29 km/h
C) 31 km/h	D) Cannot be determined

Answer & Explanation Answer:

Explanation:

Ans. Suppose the speed of boat in still water is x km/h and speed of stream is y km/h

Speedof boat in downstream = (x + y) km/h x+ y = 32 …(i)

Speed of boat in upstream = (x – y) km/h

x – y = 28 …(ii)

Add. Eqs. (i) and (ii), we get 2x = 60

x = 30 km/h

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Q:

What is the name of the new planet that NASA's Transiting Exoplanet Survey Satellite (TESS) found?

A) HD21749b	B) D21749b
C) H21749b	D) 21749b

Answer & Explanation Answer: A) HD21749b

Explanation:

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Q:

Dihang is the other name for the Indian river

A) Indus	B) Brahmaputra
C) Narmada	D) Chenab

Answer & Explanation Answer: B) Brahmaputra

Explanation:

Indian river Brahmaputra is also known as Dihang.

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Q:

What is located at 180 degrees longitude?

A) Fiji	B) Russia
C) Antarctica	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

The 180th meridian or antimeridian is the meridian 180° east or west of the Prime Meridian, with which it forms a great circle dividing the earth into the Western and Eastern Hemispheres.

It is common to both east longitude and west longitude.

It is used as the basis for the International Date Line because it mostly passes through the open waters of the Pacific Ocean. However, the meridian passes through Russia and Fiji as well as Antarctica.

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Q:

Which of the following is a feature of ghrelin?

A) It stimulates appetite and energy storage	B) It is released in high amounts from adipocytes during periods of excess energy intake
C) The blood level in the fasting state correlates directly with body weight	D) It is a metabolic antagonist of leptin

Answer & Explanation Answer: A) It stimulates appetite and energy storage

Explanation:

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Q:

Which process occurs inside the chloroplasts?

A) Photosynthesis	B) Glycolysis
C) Oxidation	D) None of the above

Answer & Explanation Answer: A) Photosynthesis

Explanation:

The process that occurs inside the chloroplasts is photosynthesis. The light from the sun is obserbed and combining with water and CO2, plants prepare food for the plants.

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Filed Under: Biology
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Q:

The primary goal of conservation biology is to

A) counter the loss of biodiversity	B) estimate the total number of species that exist
C) integrate human culture back into nature	D) catalogue species

Answer & Explanation Answer: A) counter the loss of biodiversity

Explanation:

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Q:

Produces a usable form of energy for the cell

A) Lysosomes	B) Vacuoles
C) Mitochondria	D) Ribosomes

Answer & Explanation Answer: C) Mitochondria

Explanation:

We all know that, Mitochondria is the powerhouse of the cell. In both Plants and animals, it produces a usable form of energy.

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Filed Under: Biology
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