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Question
The average period of pregnancy in human lasts for ______ days of pregnancy.
Options
280
270
266
290
Solution
The average period of pregnancy in human lasts for 280 days of pregnancy.
RELATED QUESTIONS
Egg laid after fertilisation is made up of a single cell.
Which type of reproduction :
involves gametes?
Write down the different methods of asexual reproduction.
Match the organisms given in column I with the methods of reproduction/propagation given in column II :
| Column I | Column II | |
| (i) Plasmodium | (a) Spore formation | |
| (ii) Spirogyra | (b) Leaves | |
| (iii) Jasmine | (c) Regeneration | |
| (iv) Apple tree | (d) Budding | |
| (v) Bryophyllum | (e) Binary fission | |
| (vi) Potatoes | (f) Layering | |
| (vii) Rhizopus | (g) Fragmentation | |
| (viii) Hydra | (h) Tubers | |
| (ix) Planaria | (i) Cuttings | |
| (x) Leishmania | (j) Multiple fission | |
| (xi) Sugar cane | (k) Grafting | |
| (xii) Rose |
What is the importance of DNA copying in reproduction? Explain with an example.
The offsprings formed by asexual reproduction method have greater similarity among themselves because :
(i) asexual reproduction involves only one parent
(ii) asexual reproduction involves two parents
(iii) asexual reproduction involves gametes
(iv) asexual reproduction does not involve gametes
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)The offsprings formed by asexual reproduction method have greater similarity among themselves because :
(i) asexual reproduction involves only one parent
(ii) asexual reproduction involves two parents
(iii) asexual reproduction involves gametes
(iv) asexual reproduction does not involve gametes
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)
In asexual reproduction, two offsprings having the same genetic material and the same body features are called :
(a) callus
(b) twins
(c) clones
(d) chromosomes
What type of fertilisation takes place in birds?
State whether the following statement is true (T) or false (F):
Dogs and cats reproduce from two parents.
Differentiate between the following:
Asexual reproduction and sexual reproduction.
Multiple choice question.
In angiosperms, endosperm is formed by/ due to ______
The single shield-shaped cotyledon in monocot seed is known as ______.
Seminal fluid is ______ in nature.
What is the function of inner cell mass?
Which of the following is diploid at the time of fertilization in a gametophyte of a normal angiosperm?
Explain the term reproduction.
In the list of animals given below, hen is the odd one out.
| human being | cow | dog | hen |
The reason for this is
Observe the following figures.
 |
 |
 |
|
| (a) | (b) | (c) | (d) |
- Identify the stages (a) to (d) in figure during development of human baby.
- Arrange the stages in correct sequence of development.
- Explain the development that takes place in any one stage.
The statement ‘nothing lives forever, yet life continues’ illustrates the role of ______.
