HOW DO ORGANISMS REPRODUCE

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

Tags

NGSS.MS-LS3-2

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