Hello Everyone, These are the results and explanation of Wednesday Geography and Environment Quiz #12.
[Solutions]
Q.1)Which of the following is true about river capture
1.It is caused by Tectonic movements
2.It is also cause river beheading
Which of the following is/are correct? Select the correct ans from the code given below
a)1 only
b)2 only
c)Both 1 and 2
d)Neither 1 nor 2
Ans-[C]
Explanation- Stream capture, river capture, or stream piracy is a geomorphological phenomenon occurring when a stream or river drainage system or watershed is diverted from its own bed, and flows instead down the bed of a neighbouring stream. This can happen for several reasons, including:
- Tectonic earth movements, where the slope of the land changes, and the stream is tipped out of its former course
- Natural damming, such as by a landslide or ice sheet
- Erosion, either
- Headward erosion of one stream valley upwards into another, or
- Lateral erosion of a meander through the higher ground dividing the adjacent streams.
- Within an area of karst topography, where streams may sink, or flow underground (a sinking or losing stream) and then reappear in a nearby stream valley
The additional water flowing down the capturing stream may accelerate erosion and encourage the development of a canyon
Q.2)Consider the following statements regarding CITES
1.CITES lists several animals and birds in which trade is prohibited
2.It is also known as New York convention
3.USA is a party to the convention
a)1 and 2
b)3 only
c)1 and 3
d)2 and 3
Ans-[C]
Explanation-CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora) is an international agreement between governments. Its aim is to ensure that international trade in specimens of wild animals and plants does not threaten their survival. Widespread information nowadays about the endangered status of many prominent species, such as the tiger and elephants, might make the need for such a convention seem obvious. But at the time when the ideas for CITES were first formed, in the 1960s, international discussion of the regulation of wildlife trade for conservation purposes was something relatively new. With hindsight, the need for CITES is clear. Annually, international wildlife trade is estimated to be worth billions of dollars and to include hundreds of millions of plant and animal specimens. The trade is diverse, ranging from live animals and plants to a vast array of wildlife products derived from them, including food products, exotic leather goods, wooden musical instruments, timber, tourist curios and medicines. Levels of exploitation of some animal and plant species are high and the trade in them, together with other factors, such as habitat loss, is capable of heavily depleting their populations and even bringing some species close to extinction. Many wildlife species in trade are not endangered, but the existence of an agreement to ensure the sustainability of the trade is important in order to safeguard these resources for the future.
Statement 2 is wrong, it is also known as Washington convention.
Q.3)Consider the following statements
1.Poor in Nitrogen, potassium and organic matter but rich in potash and lime
2.Do not require much moisture’
3.Expands when wet
Which of the following soil is this one? Select the correct ans from the codes below
a)Red soil
b)Alluvial soil
c)Black soil
d)Laterite soil
Ans-[C]
Explanation- Characteristics of the black soils are:
a)It has high qualities of potash, lime, iron, magnesium and generally poor percentage of phosphorous, nitrogen and organic matter.
b)It is black in color as it is formed from weathered lava rocks
c)During dry season, it shrinks and develops big cracks
d)Very clayey and retentive of water. Because of high clay content these soil expand when wet.
Q.4)Which of the following are associated with Persistent Organic Pollutants
1.Bioaccumulation
2.Biomagnification
3.They persist for a shorter duration in the atmosphere but are extremely harmful
a)1 and 2
b)2 and 3
c)1,2 and 3
d)None of the above
Ans-[A]
Explanation-You can read this in detail here.
Q.5)Which of the following are Rabi crops
1.Gram
2.Barley
3.Millet
a)1 only
b)2 and 3
c)1 and 2
d)1,2 and 3
Ans-[C]
Explanation- It is very basic question. Millets is Kharif crop
Q.6)Consider the following statements about Jetstream
1.Weakest jet streams are polar jets
2.Major jet streams flows from west to east
Which of the following is/are correct?
a)1 only
b)2 only
c)Both 1 and 2
d)None
Ans-[B]
Explanation- Jet streams are fast flowing, narrow, meandering, air currents found in the upper atmosphere or in troposphere of some planets, including Earth. The main jet streams are located near the altitude of the tropopause. The major jet streams on Earth are westerly winds (flowing west to east). Polar jet streams are strongest jet stream
Q.7) Consider the following statements regarding phytoplankton
1. They have limited locomotory power
2. They are mainly found in those parts of the aquatic ecosystem where the light can reach
3. Loss of phytoplankton adds to the global warming effect
Which of the statements given above is/are not true?
a) 1 and 3 only
b) 1 only
c) 2 only
d) None of these
Ans- [D]
Explanation- All the statements regarding phytoplankton are true.
Leave a Reply