Write the dual purpose served by urethra in males.
Draw a neat and labelled diagram showing longitudinal section of a bisexual flower.
DNA copies generated will be similar, but may not be completely identical to the original.
Give reasons why a woman should avoid frequent pregnancies.
Assertion : Menstruation is the regular discharge of blood from the thick uterine lining.
Reason : Menstruation occurs when egg is..
Assertion : AIDS is an incurabls and a fatal bacterial infection.
Reason : It is suppresses the immune system of the body
Give a few characteristics of asexual reproduction.
Some of the fungal hyphae are aerial and bear black blobs.
Explain tissue culture technique. In which area this technique is finding its application?
Define sexual reproduction.
Name the parts A, B and C shown in the following diagram and state one function of each.
Which one is not STD among the following? AIDS, diarrhoea, genital warts, syphilis
When is vegetative propagation used?
Assertion : Scrotum is present outside the abdominal cavity.
Reason : It stores sperms which require a lower temperature
Draw the diagram of a flower and label the four whorls. Write the names of gamete producing organs in the female.
List two reasons for the appearance of variations among the progeny formed by sexual reproduction.
(i) Identify whether budding as seen in Hydra is a type of sexual or asexual reproduction.
(ii) How is this process different from..
Reproduction is essentially a phenomenon that is not for the survival of an individual, but for the stability of a species. Justif..
Write two points of difference between asexual and sexual type of reproduction.
(i) Name the parts A to E of human female reproductive system.
(ii) Name the part in which fertilisation takes place in this syste..
List six specific characteristics of sexual reproduction.
(i) State any three characteristics of sexual reproduction.
(ii) Explain, what happens to the egg once it
Draw a neat diagram of fate of pollen after landing on stigma. Also label the following parts.
Reproduction is linked to stability of population of a species. Justify the statement
(i) Label the following diagram.
(ii) Which process is being shown in the diagram
Write one main difference between asexual and sexual mode of reproduction.
What is meant by pollination? Name and differentiate between the two modes of pollination in flowering plants
(i) Define germination
(ii) From the diagram given below identify the incorrectly labelled parts
What is implantation? whare does it take place?
(i) Give the possibilities for a flower
(ii) What events take place in a flower after fertilisation
Mention any one disadvantage of producing new plants by vegetative propagation.
Explain the term Regeneration as used in relation to reproduction of organisms.
List any three advantages of vegetative propagation.
What is placenta? Describe its structure. State its functions in case of pregnant human female.
(i) Identify the organisms A and B
(ii) How will an organism be benefitted
(iii) Mention the two asexual methods by which Hydra ca..
(i) Population control
(ii) Advantage of using contraceptives
Assertion : Individuals produced by asexual reproduction are known as clones
Reason : They are known as clones because they are ge..
How does fertilisation take place? Fertilisation occurs once in a month. Comment.
(i) Placenta is extremely essential
(ii) Blocking of vas deferens
(iii) Wind acts as a pollinating agent
(iv) Use of c..
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