Kerala Plus Two Botany Chapter Wise Previous Questions Chapter 1 Reproduction in Organisms
Fill up the blanks after reading the statement: (MARCH-2010)
The postfertilisation events in angiosperms.
Zygote : Embryo
Ovule : ______
Ovary : _______
Given below are 3 gametes a, b and c. a and b gametes undergoes fusion. (MARCH-2010)
a) Identify the fusion.
b) Give the explanation for the identification.
b) Fusion of two morphologically similar gametes (male & female) is called Isogamy
Raman is learning the post-fertilization changes of an angiosperm embryo sac with the help of slides. He identified the egg nucleus and polar nuclei with the help of his teacher. (MARCH-2010)
a) Name the other nuclei present in the embryo sac.
b) Help Raman by giving the changes that takes place with egg nucleus and polar nuclei after fertilization.
a) Antipodals and synergids
b) Egg nucleus + Sperm -> Sygote (2n)
Polar nuclei + Sperm -> PEN (3n) primary endosperm nucleus.
Find out which of the statements are true. (MAY-2010)
a) Ovary develops into fruit.
b) In flowering plants, zygote is formed outside the ovule.
c) Ovules develops into fruit.
d) Zygote develops into embryo.
Ovary develops into fruit.
Farmers are propagating plants using vegetative structures. Can you mention the names of any two such structures. (MAY-2010)
Rhizome – Ginger
Bulb – Onion
Prefertilization events of sexual reproduction in all organisms are gametogenesis and gamete transfer. What are the post fertilization events? (MAY-2011)
Formation of zygote
You are asked to plant ginger in your home. Which part of ginger you will plant? Name the type of reproduction. (MAY-2011)
In asexual reproduction, off springs are produced by a single parent with or without the involvement of gamete formation.(MARCH-2012)
Name the asexual reproductive structures (a & b) given below.
Zoospores are common asexual reproductive structures in plants and animals with relatively simple organization. Name two other asexual reproductive structures seen in the group. (MAY-2012)
Gemmules in sponges, conidia in penicillium
In honey bees and some lizards,female gamete undergoes development to form new organisms without fertilization. This phenomenon is called ________. (MARCH-2013)
Morphologically and genetically similar individuals are called ______ . (MARCH-2013)
Match the following terms with regard to vegetative reproduction in plants. (MAY-2013)
a) Amoeba asexually multiplies by binary fission whereas Sponge by _______ (MAY-2014)
b) Water hyacinth vegetatively multiples by offset agave by ______
Match the Column A with B: (MARCH-2015)
a) Yeast asexually multiples by budding whereas Penicillium by. (MAY-2015)
b) Bryophyllum vegetatively multiples by adventitious buds water hyacinth by
The chromosome number of onion is 16 (2n). Find the chromosome number in the following cells with reasons. (MAY-2015)
a) Endosperm cell
When a gamete without any fusion develop into a new organism the phenomenon is called ______. (MARCH-2016)
b) External fertilization
A unisexual flower having no androecium is called _____. (MARCH-2016)
Select the one which is not helping vegetative propagation. (MAY-2016)
d) Eyes of the potato
The plant in which adventitious buds along the mar¬gin of leaves give rise to new plants is (MARCH-2017)
a) Water Hyacinth
In flowering plants male flower is called ______ flower and female flower is known as _______ flower. (MAY-2017)