Home
Class 12
BIOLOGY
The set of annelid characters that are s...

The set of annelid characters that are share by leeches is -
(i) setae for locomotion
(ii) metameric segmentation
(iii) indeterminate number of segments
(iv) presence of clitellum
(v) hermaphroditism

A

i, ii and iii

B

ii, iïi and iv

C

only iv

D

only ii and v

Text Solution

AI Generated Solution

The correct Answer is:
To determine the set of annelid characters shared by leeches, we will analyze each option provided in the question step by step. ### Step 1: Analyze the first option - Setae for locomotion - Setae are bristle-like structures found in many annelids that aid in locomotion. However, leeches (class Hirudinea) do not possess setae. Instead, they use a combination of muscular contractions and suckers for movement. - **Conclusion**: This option is incorrect. ### Step 2: Analyze the second option - Metameric segmentation - Metameric segmentation refers to the division of the body into repeated segments. Leeches exhibit metameric segmentation, where their bodies are divided into segments, although the external segmentation may not be as pronounced as in other annelids. - **Conclusion**: This option is correct. ### Step 3: Analyze the third option - Indeterminate number of segments - Leeches have a determinate number of segments, typically ranging from 32 to 34 segments. This means that their segmentation is fixed and does not vary significantly. - **Conclusion**: This option is incorrect. ### Step 4: Analyze the fourth option - Presence of clitellum - The clitellum is a thickened, glandular section of the body wall in some annelids that is involved in reproduction. In leeches, the clitellum is present but is only temporary and appears during the breeding season, specifically in segments 9 to 11. - **Conclusion**: This option is somewhat misleading; while leeches do have a clitellum, it is not permanent like in earthworms. Therefore, this option is not fully correct. ### Step 5: Analyze the fifth option - Hermaphroditism - Hermaphroditism is the condition of having both male and female reproductive organs in the same individual. Leeches are indeed hermaphroditic, possessing both types of reproductive organs. - **Conclusion**: This option is correct. ### Final Conclusion: Based on the analysis, the characters shared by leeches are: - Metameric segmentation (ii) - Hermaphroditism (v) Thus, the correct options are (ii) and (v).
Promotional Banner

Similar Questions

Explore conceptually related problems

State whether each of the following set is finite or infinite : (i) The set of lines which are parallel to the x-axis (ii) The set of letters in the English alphabet (iii) The set of number which are multiple of 5 (iv) The set of animals living on the earth (v) The set of circles passing through the origin (0,0).

Give a definition for each of the following terms.Are there other terms that need to be defined first? What are they,and how might you define them? (i) parallel lines (ii) perpendicular lines (iii) line segment (iv) radius of a circle (v) square

The statements given below shows some characteristics of a phylum. Identify it. (i) Tissue absent (ii) Internal fertilisation (iii) Developments is indirect (iv) Spongocelate with ostia (many) and single osculum and cancal system (v) Sexes are hermaphrodite.

Name the following : (i) Transfer of parental characters to their offsprings. (ii) Science that deals with the study of inheritance. (iii) Father of Genetics. (iv) Functional unit of hereditary material. (v) Alternative forms of same gene. (vi) Carriers of genes.

Write the following in roster from: (i) The set of all whole numbers less than 5. (ii) The sets of all natural numbers which are multiple of 3 (iii) The set of all natural numbers less than 8. (iv) The set of all letters of the word MANGOES

Select the set of incorrect statements. I. The circulatory system in Platyhelminthes has a single opening. II. Annelids are the first animals to have true coelom and metamerism (true segmentation). III. The space between the hump and the mantle is called the mantle cavity in which gills are present. IV. Most of the echinoderms are bisexual.

Vertebrates are characterized by (i) presence of true coelom (ii) presence of notochord (iii) a ventrally placed heart (iv) the pharyngeal gill slits at some stage in life cycle (v) RBCs.

Find the number of different permutation that can be made out of the letter of the following words (i) Commerce (ii) Accountant (iii) Engineering (iv) statistics (v) Success