Home
Class 12
BIOLOGY
Assertion: Primary succession occurs ove...

Assertion: Primary succession occurs over a primarlly bare area where there was no living matter from the very beginning
Reason: During primary succession, reproductive structures of the previous occupants give rise to a new seral community as soon as the conditions become favourable. \
(a) Assertion and reason, both are correct. Reason is the correct explanation for assertion.
(b) Assertion and reason, both are correct. Reason is not the correct explanation for assertion.
(c) Assertion is correct but reason is not correct.
(d) Reason is correct but assertion is not correct.

Text Solution

Verified by Experts

The correct Answer is:
C
Primary succession (or prisere) is the biotic succession that occurs on a previously sterile or primarily bare area. Newly exposed sea floor, igneous rocks, sand dunes, new cooled lava sediments or newly submerged areas are some of the examples of primary bare area. Soil and humus is absent at the beginning of primary succession and reproductive structures of any previous community and primary succession takes a long time for completion.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion: In nature, the recycling of carbon is essentially a self-regulating feedback system. Reason: The reservoir pool of carbon consists of free CO2 in the atmosphere. (a) Assertion and reason, both are correct. Reason is the correct explanation for assertion. (b) Assertion and reason, both are correct. Reason is not the correct explanation for assertion. (c) Assertion is correct but reason is not correct. (d) Reason is correct but assertion is not correct.

Assertion: In a marine aquatic ecosystem, the biomass of phytoplanktons (producers) at any given time, is lower than the biomass of zooplanktons (primary consumers). Reason: Phytoplanktons are consumed almost as rapidly as they are formed and thus have shorter life spans. (a) Assertion and reason, both are correct. Reason is the correct explanation for assertion. (b) Assertion and reason, both are correct. Reason is not the correct explanation for assertion. (c) Assertion is correct but reason is not correct. (d) Reason is correct but assertion is not correct.

Assertion: The single cell protein forms an important source of food. Reason : Because they contain protein,carbohydrate, fats,vitamins and minerals. (a) Both Assertion and Reason are true. But Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are true. But Reason is not correct explanation of Assertion. (c) Assertion is true, but Reason is false. (d) Both Assertion and Reason are false.

Assertion: The restriction enzymes are called as molecular scissors. Reason : They cleave the DNA molecules into fragment at specific recognition sites. (a) Both Assertion and Reason are true. But Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are true. ButReason is not correct explanation of Assertion. (c) Assertion is true. (d) Both Assertion and Reason are false.

Assertion: Traditional biotechnology is the kitchen technology by using the fermenting bacteria. Reason: There is no scientific validation of these kitchen technologies. (a) Both Assertion and Reason are true. But Reason is the correct explanantion of Assertion. (b) Both Assertion and Reason are true. But Reason is not correct explanation of Assertion. (c) Assertion is true, but reason is false (d) Both Assertion and Reason are false.

Assertion : Polylactic acid (PLA) is a biodegradable and bioactive thermoplastic. Reason: It is aliphatic polyster derived from renewable resources. (a) Both Assertion and Reason are true. But Reason is the correct Explanation of Assertion. (b) Both Assertion and Reason are true. But reason is not correct explanation of Assertion. (c) Assertion is true, but Reason is false. (d) Both Assertion and Reason are false.

Assertion : Secondary metabolites are those which are required for the vital life process of microbes. Reason: They are the vital compounds required for the growth of microbes. (a) Both Assertion and Reason are true. But Reason is the correct explanation of Assertion. (b) Both Assertion and Reason are true. But Reason is not correct explanation of Assertion. (c) Assertion is true, but Reason is false. (d) Both Assertion and Reason are false.

Assertion : One of the most important traditional uses of sacred groves was that they acted as a repository for various ayurvediv medicines. Reason : In modern times , sacred groves have become biodiversity rich areas, as they provide refuge to various plant and animal species of conservation significance. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Assertion : Jim Corbett National Park is the first National Park of India and is famous for tigers. Reason : Through the main focus is protection of wildlife, the reserve management has also encouraged ecotourism in this national park. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Mark the correct choice as : (a) Both assertion and reason are true and reason is the correct explanation of assertion. (b) Both assertion and reason are true but reason is not the correct explanation of assertion. (c) Assertion is true but reason is false. (d) Assertion is false but reason is true. (e) Both Assertion and reason are false.Assertion : Women have shriller sound than men. Reason : Men produced higher frequency sound than women.