Choose the correct sequence of stages of the growth curve for Bacteria:
1. Leg, Log, stationary, Decline phase
2. Leg, Log, Stationary phase
3. Stationary, Leg, Log, Decline phase
4. Decline, Leg, Log phase
The semilog of per minute growing bacteria is plotted against time. What will the shape of the graph be:
1. Sigmoid
2. Hyperbolic
3. Ascending straight line
4. Descending straight line
Which type of association is found between entomophilous flower and pollinating agent:
1. Mutualism
2. Commensalism
3. Cooperation
4. Co-evolution
Two different species cannot live for a long duration in the same niche or habitat. This is:
1. Allen's law
2. Gloger's rule
3. Competitive exclusion principle
4. Weismann's theory
Which of the following is a correct pair:
1. Cuscuta – parasite
2. Dischidia – insectivorous
3. Opuntia – predator
4. Capsella – hydrophyte
Choose the correct match
Bladderwert, sundew, venus flytrap:
1. Nepanthese, Dionea, Drosera
2. Nepanthese, Utricularia, Vanda
3. Utricularia, Drosera, Dionea
4. Dionea, Trapa, Vanda
Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called:
1. | Morbidity | 2. | Fecundity |
3. | Biotic potential | 4. | Environmental resistance |
Mycorrhiza is an example of:
1. Symbiotic relationship
2. Ectoparasitism
3. Endoparasitism
4. Decomposers
In a population, unrestricted reproductive capacity is called:
1. Biotic potential
2. Fertility
3. Carrying capacity
4. Birth rate
What will happen if the number of organisms increased at a place:
1. Inter-species competition
2. Intra-species competition
3. Both
4. None