Last seen: Dec 29, 2021
(d) One organism is benefited, other is affected.
Logistic population growth curve or S-shaped or sigmoid growth curve is shown by the populations of most organisms. It has the following phases: la...
(a) Commensalism is an interspecific interaction between individuals of two species where one species is benefitted and the other is not affected. ...
Population: A population is a group of individuals of the same species, which can reproduce among themselves and occupy a particular area in a given t...
1. Hedgehog 2. Frog 3. Sponges
Abiotic factors are non-living factors and conditions of the environment which influence the survival, function and behaviour of organisms. Various...
(a) The animals with variable temperatures called poikilotherms are affected by temperature variations. They are also called ectotherms. They show dif...
(a) Desert plants are called xerophytes. They have adaptations for increased water absorption, reduction in transpiration and water storage. Many dese...
Ectotherms: (i) These are cold blooded poikilo-thermal animals. (ii) Their body temperature changes with the change in surrounding temperature. ...
Hibernation: (i) It is winter sleep in which animal passes the winter period in dormant condition. (ii) The animal rests in a warm place. (iii) ...
Predation is the means of biological control to manage pest insects where predators prey upon pests and regulate their numbers in the habitat.
An orchid growing as an epiphyte on a branch of mango tree is an example of commensalism. Commensalism is the relationship between individuals of two ...
Modification of leaves into thorns. Development of spiny margins on leaves. Development of sharp silicate edges on leaves.
The intrinsic rate of increase(r), can be calculated by the following exponential growth equation: Nt = N0ert ......(i) Where, Nt = 2x N0 = ...
Natality Mortality Growth forms Population density Population dispersion Population age distribution
Organisms survive at a temperature range of 0° to 40°C or less. However, there are some notable exceptions. Certain microorganisms live in hot springs...
Phenotypic adaptation involves non-genetic changes in individuals such as physiological modifications like acclimatization or behavioural changes.
If a marine fish is placed in a freshwater aquarium, then its chances of survival will diminish. This is because their bodies are adapted to high salt...
The table below shows the differences between them: Diapause: (i) It is the period of suspended development or growth of an organism during stress...
The objectives of setting up GEAC are: (a) to have some ethical standards to evaluate the morality of human activities that might help or harm livin...