List of top Environmental Sciences Questions asked in Common University Entrance Test

Choose the correct statements:
Statements:
A. Many echinoderms are able to regenerate lost parts.
B. In many echinoderms, respiration and waste removal takes place by means of skin gills.
C. Sea urchins lack distinct arms but have the same five-part body plan as all other echino derms.
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Polar species tend to have longer geographical ranges than tropical species in many taxonomic groups. This is generally known as:

A geographical unit delineated by sharp gradients where precipitation or snowmelt flows along one side of the gradient, depending upon local topography and natural hydrology, is called:

The monumental book ’Silviculture of Indian Trees’ is written by:

Choose the correct statements:
Statements:
A. In sickle cell anemia, a valine is substituted for the glutamic acid at a location on the surface of the protein near the oxygen-binding site.
B. The red blood cells of people who are homozygous for the sickle cell allele collapse into sickled shape when the oxygen level in the blood is low.
C. Individuals who are heterozygous for the recessive valine-specifying allele are said to possess the sickle cell trait.
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Island communities are a special case in community dynamics in which species makeup is driven by interaction between:
A. Predator abundance
B. Disturbance
C. Colonization
D. Extinction
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Arrange the stages by which a species becomes invasive in an area:
A. Introduced
B. Established
C. Pest
D. Imported
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Fungal diversity is currently classified into:

Bryophytes are divided into three distinct phyla. The liverworts belong to the phylum:

It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:

The main limiting factors for both plants and animals on a global scale are:
A. Fire
B. pH
C. Temperature
D. Moisture
Choose the correct answer from the options given below:

Match List I with List II:

LIST I - Ecological Parameters	LIST II - Unit of Measurement
A. Net primary productivity	I. g/m2
B. Absorbed photosynthetically active radiation	II. g/L
C. Phosphorus	III. Joules/area/year
D. Plant biomass	IV. gC/area/year

Choose the correct answer from the options given below:

The ”Biofilm” is a thin layer that constitutes:

Starch, the major product of photosynthesis in leaves, gets accumulated in:

Which of the following reproduce sexually by forming ascospores, which are small sacs commonly referred to as ”asci”?

Overall Glycolysis yields some ATPs, but in early stages, ATP is utilised to phosphorylate sugar substrates. In which of the following steps is ATP consumed?

Which among the following is/are false?
Statements:
A. Most conifers are monoecious, evergreen, and produce resin.
B. Cycads are dioecious.
C. There is one living species in the phylum Ginkophyta.
D. Gnetum shows the presence of two distinct archegonia in a female gametophyte.
E. Compositae family is known as Asteraceae.
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Which of the following structure cannot be taken by the single subunit protein?

Which of the following organelles contains DNA?

There are several instances where the DNA of the bacteriophage resides inside the bacterial cell without replication and virus generation. The process of co-existence of the bacterium and phage DNA is known as:

Hypothalamus is present in which part of the brain?

Organogenesis in humans takes place during:

Match List I with List II:

LIST I	LIST II
A. Ligase	I. Reduce topological strain
B. Helicase	II. Adds phosphate group
C. Gyrase	III. Joins two open ends of DNA
D. Kinase	IV. Unwinds the DNA

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The correct sequence of classification of house mouse is:

Which of the following phosphate species does not exist in water?