K.C.S.E Biology Q & A - MODEL 2006PP1QN02
​Name the part of the flower that develops into
a) Seed b) Fruit
answers
(a) Ovule
(b) Ovary
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K.C.S.E Biology Q & A - MODEL 2005PP1QN15
a) What is meant by the terms
(i) Epigymous flower (ii) Staminate flower? b) How are the male parts of wild pollinated flowers adapted to their function?
answers
a)i) A flower whose ovary is situated below the other floral parts.
ii) A flower with only the male reproductive parts parts (male flower) b) Larger anthers. Anther loosely attached Flexible filament Small, smooth and light pollen grains
​K.C.S.E Biology Q & A - MODEL 2004PP1QN11
Fruit formation without fertilization is called
answer
K.C.S.E Biology Q & A - MODEL 2004PP1QN05
During which phase of meiosis does crossing over occur.
answer
K.C.S.E Biology Q & A - MODEL 2003PP1QN03
How do the male gamete nuclei reach the ovule after pollen grains land on the stigma?
answers
K.C.S.E Biology Q & A - MODEL 2002PP1QN17
What structures are produced by sisal for vegetative propagation?
answers
K.C.S.E Biology Q & A - MODEL 2002PP1QN13
The chart below shows the number of chromosomes before and after cell division and fertilization in a mammal.
a) What type of cell division takes place at Z
b) Where in the body of a female does process Z occur c) On the chart, indicate the position of parents and gametes d) Name the process that leads to addition or loss of one or more chromosomes. e) State three benefits of polyploidy in plants to a farmer
answers
​a) Meiosis
b) Ovary c) parent must be the 2n top; any ‘n’ is a gamete d) Non – dysfunctions e) increased yields / highbred Vigor, Resistance decreases Resistance to drought.
K.C.S.E Biology Q & A - MODEL 2001PP1QN18b
State the change that take place in a flower after fertilization
answers
K.C.S.E Biology Q & A - MODEL 2001PP1QN18a
Describe the process of fertilization in a flowering plant
answers
pollen grains stick in the stigma surfaces; that surface of stigma producers a chemical substance; which stimulates the pollen grain to produce a pollen tube / germinate. The pollen tube/ germinate. The pollen tube grows down (into the tissues of style) from where it derives nutrients; the generative nucleaus divides to give rise to two male nuclei and the antipodal cells; when pollen tubes disintegrates and make nucleus fuses with the egg cell and forms the zygote. The other male nucleus fuss with the two polar nuclei to form a triploid nucleus. The process involves double fertilization.
K.C.S.E Biology Q & A - MODEL 2001PP1QN09
Name three types of chromosomal mutations
ANSWERS
K.C.S.E Biology Q & A - MODEL 2001PP1QN04
Name the parts of the flower that are responsible the production of gametes
ANSWERS
K.C.S.E Biology Q & A - MODEL 2000PP1QN16b
State three advantages of asexual reproduction
answers
K.C.S.E Biology Q & A - MODEL 2000PP1QN16a
What is the significance of sexual reproduction?
answers
K.C.S.E Biology Q & A - MODEL 1999PP1QN08
State two disadvantages of self-pollination.
answers
K.C.S.E Biology Q & A - MODEL 1998PP1QN13
(a) List four differences between meiosis and mitosis
(b) Which sex chromosomes are found in human? Sperm cell? Ova? K.C.S.E Biology Q & A - MODEL 1997PP1QN17
​Figures 1 and 2 below represent reproductive organ of plants and an animal respectively.
​(a) Which letters in figures 1 and 2 represents the organs that produce female gametes?
Figure 1 Figure 2 (b) What is the function of the structure labeled S? (c) Name the structure labeled W (d) Which letters in figures 1 and 2 represents the structures where fertilization takes place (e) Which letter in figure 1 represents the structure where male gametes are produced?
answers
​(a) Figure 1 R:
Figure 2 T: (b) Development of the foetous/zygote/fertilized/ova/egg/embryo (c) Style (d) R;P; (e) X
K.C.S.E Biology Q & A - MODEL 1996PP1QN 22
Describe how new plants arise by asexual reproduction
ANSWERS
(a) Describe how insect pollinated flowers are adapted to pollination |
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