Organisms and Populations
- Competition for light, nutrients and space is most severe between
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Competition is most severe between the members of a population belonging to same niches.
Correct Option: B
Competition is most severe between the members of a population belonging to same niches.
- Two plants can be conclusively said to belong to the same species if they
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When the members of a species are inter - fertile and produce fertile offsprings.
Correct Option: D
When the members of a species are inter - fertile and produce fertile offsprings.
- A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is:
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Commensalism is a interaction where one species is benefitted and other is neither benefitted nor harmed.
Correct Option: B
Commensalism is a interaction where one species is benefitted and other is neither benefitted nor harmed.
- A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:
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Net increase in population:
(Natality + Immigration) – (Mortality + Emigration)
(250 + 20) – (240 + 30) = 270 – 270 = 0Correct Option: C
Net increase in population:
(Natality + Immigration) – (Mortality + Emigration)
(250 + 20) – (240 + 30) = 270 – 270 = 0
- Cuscuta is an example of
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Cuscuta, or Dodder plant, is a parasitic plant that wraps around other plants for nourishment. Cuscuta is found on outer side of the host and is total stem parasite. Cuscuta a parasite of Acacia.
Correct Option: A
Cuscuta, or Dodder plant, is a parasitic plant that wraps around other plants for nourishment. Cuscuta is found on outer side of the host and is total stem parasite. Cuscuta a parasite of Acacia.
