Short Answer TypeGive a scientific term :
Maximum number of individuals that an environment can support.
(a) Organisms may be conformers or regulators. Explain this statement and give one example of each.
(b) Why are there more conformers than regulators in the animal world ?
Describe the inter-relationship between productivity, gross primary productivity and net productivity.
Long Answer Type(a) Compare, giving reasons, the J-shaped and S-shaped models of population growth of a species.
(b) Explain ‘fitness of a species’’ as mentioned by Darwin.
Short Answer TypeFollowing are the responses of different animals to various abiotic factors. Describe each one with the help of an example.
(i) Regulate
(ii) Conform
(iii) Migrate
(iv) Suspend
If 8 individuals in a population of 80 butterflies die in a week, calculate the death rate of population of butteflies during that period.
Multiple Choice QuestionsIn biotic community, which of the following can be called protective device ?
Mimicry
Symbiosis
Competition
Parasitism
A.
Mimicry
Mimicry is characterized by the superficial resemblance of two or more organisms that are not closely related taxonomically. Also, it is a resemblance of one organism to another which has evolved as a means of protection. Therefore, it is considered as a superficial protective device in a biotic community.
Symbiosis refers to a close, long term interaction between two different species. It is of several types. Mutualism, Commensalism, Parasitism are types of symbiotic relationships.
Competition is an interaction between organisms or species in which both the organisms or species are harmed.
Parasitism is a relationship between species, where one organism ie, the parasite, lives on or in another organisms ie, the host, causing it some harm and hence, is adapted structurally to this way of life.
It is much easier for a small animal to run uphill than a large animal, because
smaller animals have a higher metabolic rate
small animals have a lower O2 requirement
the efficiency of muscles in large animals in less than in the small animals
the efficiency of muscles in large animals in less than in the small animals
Switch
