Which one of the following amino acids was not found to be synthesized in Miller’s experiment?
1. | Glycine | 2. | Aspartic acid |
3. | Glutamic acid | 4. | Alanine |
Crop plants grown in monoculture are:
1. low in yield
2. free from intraspecific competition
3. characterized by a poor root system
4. highly prone to pests
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
1. 1986
2. 1987
3. 1988
3. 1985
The formula for exponential population growth is:
1. dt/dN= rN
2. dN/rN= dt
3. rN/dN= dt
4. dN/dt= rN
Which one of the following is not used for the construction of ecological pyramids?
1. | Dry weight | 2. | Number of individuals |
3. | Rate of energy | 4. | Fresh weight |
Niche overlap indicates:
1. | active cooperation between two species |
2. | two different parasites on the same host |
3. | sharing of one or more resources between the two species |
4. | mutualism between two species |
In photosystem-I, the first electron acceptor is:
1. ferredoxin
2. cytochrome
3. plastocyanin
4. an iron-sulphur protein
Treatment of seed at low temperature under moist conditions to break its dormancy is called:
1. sacrification
2. vernalization
3. chelation
4. stratification
Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?
1. Moist bread
2. Agar agar
3. Ripe banana
4. Cow dung
Which one of the following is not included under in situ conservation?
1. Sanctuary
2. Botanical garden
3. Biosphere reserve
4. National park