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WorksheetsBiology term 2 class X
Total questions: 24
Worksheet time: 27mins
An organism capable of reproducing by two asexual reproduction methods one similar to the reproduction in yeast and the other similar to the reproduction in Planaria is:
(a) Spirogyra
(b) Hydra
(c) Bryophyllum
(d) Paramecium
If a cow has 60 chromosomes in a somatic cell how many chromosomes would be in a cow's sex cell?
60
120
30
90
1. In a flower, the parts that produce male and female gametes are-
Stamen and anther
Filament and style
Anther and ovary
Stamen and style
1. A feature of reproduction common to amoeba, spirogyra and yeast is
They reproduce asexually
They are unicellular
They reproduce sexually
They are multicellular
1. Vegetative propagation refers to formation of new plants from-
Stem, root, flower
Stem, root, leaves
Stem, fruits, flower
Stem, leaves, flower
1. In Figure, the parts A, B and C are sequentially
cotyledon, plumule and radicle
plumule, radicle and cotyledon
plumule, cotyledon and radicle
radicle, cotyledon and plumule
During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys
loss of milk teeth
increase in height
cracking of voice
weight gain
Which of the following is not an outcome of variations present in a population?
Bacterial resistance to heat
Different colour of eyes
Maintenance of body design features
Survival of species over time
Offsprings produced by asexual reproduction have greater similarity among themselves because
i. Asexual reproduction involves only one parent
ii. Asexual reproduction does not involve gametes
iii. Asexual reproduction occurs before sexual reproduction
iv. Asexual reproduction occurs after sexual reproduction
i and ii
i and iii
ii and iv
iii and iv
Oral contraceptives prevent the
Fertilisation
Implanatation
Entrance of sperms in vagina
Ovulation
Rhizopus is an example of
Fragmentation
Vegetative Propagation
Budding
SPORE FORMATION
In this method the body of a simple multicellular organism breaks up into smaller pieces on (a)
(a) is an asexual reproduction by which a unicellular organism divides and forms two or more new individuals.
(a) In this method an organism divides and forms two individuals. First the nucleus divides and forms two nuclei. Then the cytoplasm divides and forms two daughter cells.
Examples of Asexual Reproduction
Vegetative Propagation
Budding
Fragmentation
Spore Formation
What is Variation?
Noticeable change in 2 different species
It is the copying during reproduction is important for maintaining the body designs of different organisms to survive in the existing environment.
It refers to the visible difference between two individuals or among a group of individuals or species.
(a) is the example of Spore Formation
