18 Questions
What is the birthrate per lotus plant per year after 8 new plants are added to a pond with 25 lotus plants?
0.2
In the logistic growth curve formula dN/dt = rN(1 - N/K), what do N and K represent?
N - Natality, K - Mortality
Which of the following pairs does NOT represent an example of commensalism?
Ticks and dogs
How many examples of competition are present in the given list below: Flamingo and fish, Cattle egret bird and cattle, Lice on Humans, Fig tree and wasp?
Two
Which statements about biological concepts are correct? (i) Biological control methods rely on predator-prey relationships, (ii) Endoparasites live outside the host body, (iii) In Mediterranean orchids, flower petals mimic female bees, (iv) Co-evolution occurs in fig-wasp relationships.
1
Which attributes belong to populations but not individual organisms? a. Birth rate b. Death rate c. Sex ratio d. Ovule production.
a and c
Which term refers to the amount of nutrients like carbon, nitrogen, phosphorus, and calcium present in the soil at a given time?
Standing crop
What constitutes the second trophic level in a lake ecosystem?
Zooplankton
Which statement accurately describes productivity?
Primary productivity depends on plant species in an area
Which of the following statements is incorrect?
Pyramid of energy is primarily inverted
In population dynamics, what term refers to a relationship where one organism benefits while the other is harmed?
Parasitism
In the context of growth curves, which curve reflects a period of rapid and exponential growth followed by stabilization?
Logistic growth curve
Which type of growth curve is exhibited after exponential population increase becomes stagnant?
S-shaped
In the context of symbiotic relationships, what type of relationship is present between Mycorrhiza and plants?
Mutualism
Which factors can affect the primary productivity of an ecosystem?
Environmental factors and nutrient availability only
Which of the following statements about energy flow in ecosystems is incorrect?
Grazing food chain is the major conduit for energy flow in aquatic ecosystems
What chemical is produced by the Rauwolfia vomitoria plant?
Reserpine
Which term describes a symbiotic relationship where one organism benefits while the other is harmed?
Parasitism
This quiz involves calculating the birth rate of lotus plants per plant per year, based on the scenario where 8 new plants are added to a pond with 25 lotus plants. Test your understanding of birth rate calculations in ecological contexts.
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