The diagram below represents female reproductive system;
(a) Name the part labelled ;A ,B ,C and D. (4mks)A:
ovary
B:
Oviduct/fallopian tube
C:
Uterus/uterine wall
D:
D - Cervix
(b) State two functions of structure A. (2mks)
Produce ova femme hormones/ Estrogen and progesterone.
(c) How is part C adapted to its functions? (1mk)
(d) Of what significance is part E to reproduction? (1mk)
Copulation/Achieve orgasm in Human male followed by ejaculation birth canal
The diagram below shows a specialized cell from a human being.
(a) Identify the cell. (1mk)
Sperm cell/spermatozoon;
(b) Name the parts labelled A,B, and C. (3mks)A:
A crosome;
B:
Nucleus
C:
Mitochondria
(c) State the functions of the part labeled D. (1mk)
Propels the sperm forward
(d) A student observed cells under a microscope and counted six (6) cells a cross the diameter of view. The diameter of field of view was found to be 1.25mm. Calculate the length of one of the cells observed. ( Answer in micrometer). (3mks)
a) Identify the type of asexual reproduction exhibited by yeast cells (1mk)
Budding;
b) List down the functions of the following parts; (3mks)i) Testis
ii) Fallopian tube
iii) Urethra
Passage of urine/sperms/semen;
State three ways how HIV and AIDS is transmitted in human population (3mks)
Discuss the adaptations of the reproductive system of a male mammal to its function
 The diagrams below show a pair of homologous chromosomes. Study them and answer the questions that follow (i) State the phenomenon shown above (1mk)Crossing over (ii) What is the genetic significance of the phenomenon above? (2mks)Variations; which may lead to new genetic fruits either advantages or disadvantages to the organism/may lead to evolution
Name the hormone responsible for the development of secondary sexual characteristics in human males.1/7/2020
K.C.S.E Biology Q & A - MODEL 2017PP2QN04
Name the hormone responsible for the development of secondary sexual characteristics in human males.
answer
K.C.S.E Biology Q & A - MODEL 2017PP1QN07
The diagram below represents a stage in the division of a cell.
​With a reason, identify the organism from which the cell was obtained.
answers
K.C.S.E Biology Q & A - MODEL 2016PP2QN01
The diagram below represents a human foetus in a uterus.
​(a) Name the part labeled S.
(b) (i) Name the types of blood vessels found in the structure labaled Q. (ii) State the difference in composition of blood found in the vessels named in (b) (i) above. c)Name two features that enable the structure labeled P to carry out its function. (d) State the role of the part labeled R.
ANSWERS
K.C.S.E Biology Q & A - MODEL 2011PP2QN05
The diagram below represents a flower.
(i) On the diagram, name two structures where meiosis occurs.
(ii) How is the flower adapted to prevent self-pollination? (ii) How is the flower adapted to prevent self-pollination? (b) The diagram below represents a human reproductive organ. 
​(i) Explain two adaptations of the structure labelled L to its functions.
(ii) Explain the role of the gland labelled K.
answers
​(a) (i) Anthers; Ovary;
(ii) Anthers are below the stigma to minimise self pollination;
production; it has many, long and coiled seminiferous tubules to increase the surface area for production/storage of sperms; (ii) K produces an alkaline fluid that neutralizes acid in the vagina; this fluid contain nutrients for the sperms; and also activates sperms;
K.C.S.E Biology Q & A - MODEL 2011PP1QN28
State two ways by which auxins regulate growth in seedlings.
ANSWERS
K.C.S.E Biology Q & A - MODEL 2010PP1QN22
What is the function of the following structures in the human reproductive organs?
(a) Fallopian tubes. (b) Epididymis. (c) Scrotal sac.
answers
(a) Passage of ova;
(b) Storage of sperms; (c) Hold the testis;
K.C.S.E Biology Q & A - MODEL 2000PP1QN18
Describe the role of hormones in the human menstrual cycle
answers
​Inferior lobe of pituitary gland secretes F.S.H which causes grafian follicle develops in the ovary. It also stimulates ovary tissue/ ovary/ follicle walls secret estrogen which repairs, heals uterine wall, oestrogen stimulates inferior lobe of pituitary gland produce L.H. for ovulation. It also causes grafian follicle change into corpus interim L.H stimulates corpus luteum secret progesterone which causes proliferation of the uterine walls; in preparation of implantation; oestrogen/ progesterone inhibits the production of F.S.H ( by anterior lobe of pituitary) thus no more follicle develop; and oestrogen production reduces; 14 days later progesterone level rises inhibits production of L.H from anterior lobe of pituitary gland produce L.H for ovulation. It also causes grafian follicle change into corpus interim L.M stimulates corpus luteum secret progesterone which causes proliferation of the uterine walls in preparation of implantation; oestrogen/ progesterone inhibits the production of F.S.H ( by anterior lobe of pituitary) thus no more follicle develop; and oestrogen production reduces; 14 days later progesterone level rises inhibits production of L.H from anterior lobe of pituitary gland/ The corpus luteum stops secreting progesterone, and menstruation occur when the level of progesterone drops; ( anterior lobe of pituitary starts secreting F.S.H again.
K.C.S.E Biology Q & A - MODEL 1999PP1QN03
Explain why sexual reproduction is important in organisms
answers
K.C.S.E Biology Q & A - MODEL 1996PP1QN12 Give a reason why it is necessary for frogs to lay many eggs
ANSWERS
​To increase the chances of fertilization and survival of species
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