Home
Class 12
BIOLOGY
Study the following ecological pyramids ...

Study the following ecological pyramids carefully.

Mathc the following statements I,ii and iii with gien pyramidsa, B and C and select the correct answer.
(i) Inverted pyramid of biomass depicting small standing crop of phytoplanktons supporintg a large standing crop of zooplanktons
(ii) Pyramid of numbers in a grassland ecosytems showing about 6 milion producers.
(iii) Upright pyramid of biomass

A

ii,iii,i

B

ii,I,iii

C

I,iii,ii,iv,v

D

I,ii,iii

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Read the following statement regarding bryophytes and select the correct answer. (i). Bryophytes lack true roots, stem and leaves. (ii). The main plant body is haploid (iii). Sex-organs are unicellular and non-jacketed (iv). Fertilisation produces an embryo inside the water.

Read the following statements about the given diagram carefully and state which of them are correct ? (i) A carries urine and sperms. (ii) B secretes a fluid that helps in the lubrication of penis. (iii) D produces testosterone but not sperms (iv) C stroes sperms.

Study the following statements and select the correct ones (i) Methanogens are archeabacteria which produce methane in marshy areas (ii) Nostoc is a filamentous blue green alga which fixes atmospheric nitrogen. (iii) Many membres of the genus Glomus form my corrhiza.

Study the following statements and select the correct ones. (i) Herbarium is a store house of collected plant specimens that are dried, pressed and preserved on sheets. (ii) Flora provides the index to the plant species found in a particular area. (iii) Monographs contain information about particular taxon.

Given figure represents a pyramid of biomass in an aquatic ecosystem. Identify A and B and select the correct answer. (i) A is the crop which supporsts and B is the crop which is supported. (ii) A is the crop which is supported and B is the crop which supports. (iii) A is phytoplanktons and B is zooplanktons. (iv) A is zooplanktons and B is phytoplanktons.

Study the following statements and select the incorrect ones. (i) Pyramids of energy and yearly biomass production can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted, since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprohytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

Read the following statements about asexual reproduction and select the correct ones. (i) It involves a single parent. (ii) It is slower than sexual reproduction. (iii) It produces progeny that are genetically identical with the parent but not with one another. (iv) The progeny of asexual reproduction can be termed as clones.

Read the following statements about the reproductive cycles in mammals and select the correct ones. (i) Oestrous cycle occurs in primate mammals. (ii) In species with oestrous cycle, females are generally sexually active during oestrous phase. (iii)Both the cycles show monthly recurrence.

Refer to the given figures and answer Read the given statements which represent the features of the figures A,B,C and D Mathc them correctly and select the correct option. (i) Chromosomes appear like a ball of wool (spireme stage) (ii) Reformation of nuclear envelope, nucleolus, Golgi complex and ER (iii) Formation of equatorial plate (iv) Splitting of centromeres

Study the following figures and select the correct statements regarding these. (i)A shows mode of asexual reproduction in sponges through internal buds. (ii)B shows sexual reprodction through zoospores in Chlamydomonas. (iii) C shows asexual reproduction through fragmentation in Penicullium. (iv) D shows external budding in Sycon.