Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

Choose the correct answers from the alternatives given.
Most of biological diversity has probably arisen by:

  1. anagenesis

  2. cladogenesis

  3. sympatric speciation

  4. phyletic evolution
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anagenesis and cladogenesis are the two main ways speciation occurs. One involved the slow transition of one species to another. Cladogenesis involved the separation of a species into two or more groups, with each group then becoming its own separate species.

Phyletic gradualism is a model of evolution which theorizes that most speciation is slow, uniform and gradual. When evolution occurs in this mode, it is usually by the steady transformation of a whole species into a new one.
Sympatric speciation is a geographic mode of speciation due to geographical isolation new species is form.
So correct answer is B, cladogenesis.

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

High concentration of $SO _{2}$, $NO _{2}$, $CO _{2}$, SPM in atmosphere, causes threats to

  1. Human health

  2. Environment

  3. Plants

  4. Soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

These pollutants (sulfur dioxide, nitrogen oxides, carbon dioxide, and suspended particulate matter) are major components of air pollution, which directly impacts human respiratory and cardiovascular health.

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

State whether the following statements are true or false.
Human intervention in natural community interactions usually makes the community more stable 

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Humans cause a lot of destruction to the natural world, through deforestation, starting forest fires, farming, and building things. So, when we destroy the environment making it unstable, we allow a new environment where secondary succession begins to take place. It is still slow, and habitats take hundreds of years to rebuild, and often are nothing like the habitat before it.

So, the given option is 'False'. 

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

Clinkers can be used as aggregate: concrete and

  1. Road Materials

  2. Furnitures

  3. Farms

  4. Food
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Clinkers are the stony residues from burnt coal or industrial furnaces. They are commonly used as aggregate in construction materials like concrete and for building road foundations.

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

Which ecosystem is very important for man to produce food and fiber?

  1. Man subsidized solar power ecosystem

  2. Unsubsidized natural solar powered ecosystem

  3. Naturally subsidized solar powered ecosystem

  4. Fuel power ecosystem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Man-subsidized solar-powered ecosystems, such as modern farms, use additional energy inputs to maximize the production of food and fiber compared to natural, unmanaged ecosystems.

Multiple choice biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

Global warming could cause a rise in the sea level because

  1. Oceans expand as they get warmer

  2. Glaciers and ice-sheets melt

  3. Both of the above

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Melting of mass ice, glaciers around the world have caused increase in the sea level. The global warming is the main reason for the melting of ice, which are also a big reservoir of fresh water.

Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

................... possess notochord, ............... do not possess notochord.

  1. Vertebrates, invertebrates

  2. Invertebrates, vertebrates

  3. Notochords, chordates

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The animals who posses a proper notochord are known as vertebrates whereas the organisms who do not have a proper notochord are known as invertebrates.

Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

.............. are those animals which have no backbone.

  1. Invertebrates

  2. Vertebrates

  3. Mammals

  4. Aves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The vertebral column is a supportive structure derived from the notochord. It is more commonly called the backbone or the spine. Animals that do not possess or develop a vertebral column or backbone are commonly called invertebrates. They include crabs, snails, lobsters, octopuses, sea urchins, worms, etc.

So, the correct answer is 'Invertebrates'.

Multiple choice biology diversity in living things and their classification oviparous and viviparous number and shape of cells unicellular and multicellular organisms

Human beings are invertebrate.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vertebrates are the animals that possess a dorsal hollow nerve cord, pharyngeal gill slits, and a notochord at some stage of their lives. Human beings are mammals that possess all three of these characteristics and are hence vertebrates.

So, the correct answer is 'False'.