Home
Class 12
BIOLOGY
Study the following figures and select t...

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.

A

(i) and (ii)

B

Smaller organisms always have shorter life span and vice versa.

C

(ii), (iii), and (iv)

D

(i) and (iv)

Text Solution

Verified by Experts

The correct Answer is:
d
B shows asexual reproduction through zoospores in Chlamydomonas. C shows asexual reproduction through conidiospores in Penicillium.
Promotional Banner

Similar Questions

Explore conceptually related problems

Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution ? (i) Lower groups of organisms have simpler body design. (ii) Asexual reproduction is common in lower groups. (iii) Asexual reproduction is common in higher groups of organisms. (iv) The high incidence of sexual reproduction in angiosperms and vertebrates. Choose the correct answer given below.

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.

Refer to the given graph showing relationship between temperature and enzyme action. Select the correct statement regarding 'A' and 'B'. (i) 'A' shows the rate at which reaction decreases due to denaturation of enzyme molecules. (ii) 'B' shows rate at which reaction increases due to decreased kinetic energy of substrate. (iii) As temperature rises, more and more enzyme molecules are denatured and 'A' appears to fall. (iv) 'B' shows rate at which reaction increases due to increased kinetic energy of substrate and enzyme molecules.

A few statements with regard to sexual reprodction are given below. (i) Sexual reproduction does not always require two individuals. (ii) Sexual reproduction generally involves gametic fusion. (iii) Meiosis never occurs during sexual reproduction. (iv) External fertilisation is a rule during sexual reproduction. Choose the correct statements from the option below.

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.

Which of the following statements is/are correct or incorrect regarding Class Amphibia? (i) Body is divisible into head and trunk. Tail is present in some amphibians. (ii) Show respiration by gills, lungs and through skin. (iii) Has scales in all its members. (iv) Can lead dual life (aquatic and terrestrial) (v) Has eyelids.

Study the following statements and select the incorrect ones. (i) Physical removal of large and small particles through filtration and sedimentation is called primary sewage treatment. (ii) Secondary sewage treatment is mainly a mechanical process. (iii) Activated sludge sediment in a sewage treatment plant is a rich source of aeroic bacteria. (iv) Biogas, commonly called as gobar gas, is pure methane.

Refer to the given graph showing state of ionisation of zwitterion. Select the correct statements regarding zwitterion. (i) Zwitterions can be formed from compunds that contain both acid groups and basic groups in their molecules. (ii) A zwitterion can act either as proton donor or proton acceptor. (iii) A monoamine monocarboxylic alpha -amino acid is a acid at high pH as both the groups (amino and carboxyl) lose a proton. (iv) Amino acids in solution at neutral pH exist predominantly as dipolar ions, the amino group is protonated (-NH_(3)^(+)) and the carboxyl group is deprotonated (-COO^(-)) .

Read the given statements about algae and select the correct option: (i). Plant body is thalloid (ii). They are largely aquatic. (iii). Reproduction occurs by vegetative, asexual and sexual methods. (iv). Chlamydomonas, volvox and Ulothrix are the multicellular algae.

Study the following statements regarding food chains and select the correct ones. (i) Removal of 80% tigers from an area resulted in greatly increased growth of vegetation. (ii) Removal of most of the carnivores resulted in an increased population of deers. (iii) The lenght of food chains is generally limited to 3-4 trophic levels due to energy loss. (iv) The lenght of food chains may vary from 2 to 8 trophic levels. A) i and ii B) ii and iii C) i and iii D) iii and iv