Q. No.The chemical defence produced by plants against herbivory are:
1. primary metabolites 2. secondary metabolites 3. cofactors 4. pollens
All the following are symbiotic relations except:
1. monarch butterflies and viceroy butterflies
2. lichens
3. mycorrhizae
4. tapeworms and humans
To avoid herbivory milkweeds secret latex containing:
1. cardiac glycosides
2. stipules
3. mustard oils
4. strychnine
The two species physically interfere with one another by aggressively attempting to exclude one another from particular habitats in:
| 1. | competitive exclusion | 2. | predation |
| 3. | exploitative competition | 4. | interference competition |
Monarch butterflies are toxic and unpalatable to predators because they:
| 1. | incorporate the toxic chemicals from the milkweed they eat |
| 2. | produce their own secondary compounds |
| 3. | break down the toxic chemicals from the milkweed they eat |
| 4. | live with symbionts that secret toxins |
Cryptically colored animals are most likely:
| 1. | Batesian mimics | 2. | is palatable to predators |
| 3. | aquatic | 4. | top predators |
Number of species in a community is an indicator of its:
| 1. | spatial heterogeneity | 2. | ecosystem productivity |
| 3. | species diversity | 4. | species richness |
Identify the correct statement:
| 1. | Eutrophic lakes contain fewer nutrients than oligotrophic lakes. |
| 2. | Xerarch succession is a primary succession that occurs in water bodies. |
| 3. | Most ecologists believe that most communities achieve stable, unchanging climax vegetation. |
| 4. | A mature ecosystem has greater species richness, greater biomass, and less net productivity than a younger stage of succession. |
The phenomenon of character displacement is seen in:
1. sympatric species
2. allopatric species
3. primary succession
4. secondary succession
A form of mimicry where a harmless species has evolved to imitate the warning signals of a harmful species directed at a predator of them both is called:
1. Mullerian mimicry
2. Batesian mimicry
3. cryptic coloration
4. disruptive coloration
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