I. The human liverfluke, a nematode parasite, depends on two intermediate hosts (snail and fish) to complete its life cycle.
II. The malaria parasite needs a vector (mosquito) to spread to other hosts.
III. The female mosquito is not considered parasite; however, it needs our blood for reproduction.
IV. In case of brood parasitism, the eggs of parasitic birds (e.g., cuckoo) are not detected and ejected from the nest because the parasite's eggs resemble the hosts eggs in morphology and colour.
V. A population of frogs protected from all predators would increase indefinitely with unlimited food resources.
Which statements are correct?
II. The malaria parasite needs a vector (mosquito) to spread to other hosts.
III. The female mosquito is not considered parasite; however, it needs our blood for reproduction.
IV. In case of brood parasitism, the eggs of parasitic birds (e.g., cuckoo) are not detected and ejected from the nest because the parasite's eggs resemble the hosts eggs in morphology and colour.
V. A population of frogs protected from all predators would increase indefinitely with unlimited food resources.
Important Questions on Organisms and Populations
| (a) | Earthworm | (p) | Pioneer species |
| (b) | Succession | (q) | Detrivore |
| (c) | Ecosystem service | (r) | Natality |
| (d) | Population growth | (s) | Pollination |
| Column-I | Column-II | ||
|---|---|---|---|
| Saprophyte | Symbiotic association of fungi with plant roots | ||
| Parasite | Decomposition of dead organic materials | ||
| Lichens | Living on living plants | ||
| Mycorrhiza | Symbiotic association of algae and fungi |
Choose the correct answer from the options given below:
1) The human liver fluke, a nematode parasite, depends on two intermediate hosts (a snail and a fish) to complete its life cycle.
2) The malarial parasite needs a vector (mosquito) to spread to other host organisms.
3) In case of brood parasitism, the eggs of parasitic birds (e.g., cuckoo) are not detected and removed from the nest because the parasite's eggs resemble the host's eggs in morphology and colour.
4) A population of frogs protected from all predators would decrease indefinitely.
In the following equation of Verhulst - Pearl logistic growth, the letter denotes ___ .
The shape of the pyramids reflects the growth status of the population. Identify the type of age pyramid represented below for human population.
Read the following data carefully
| Parameter | Values |
| Initial population of lions | |
| Number of new births in one year | |
| Number of deaths in one year |
Imagine the lion population grows logistically where the carrying capacity is Then the per capita birth rate, per capita death rate, intrinsic rate of natural increase, increase or decrease in population during the unit time period are respectively
If resources are limited
If two species occupy different niches
If resource partitioning takes place between two species
If two species occupy identical niche
