Pollen grains land on the stigma and germinate
A pollen tube develops from the pollen grain and grows down the style to the ovary.It obtains nourishment along the style
The tube nucleus leads the way and generative nucleus follow close behind it
As the tube grows downwards the generative nucleus divides by mitosis to form two male nuclei
The pollen tube breaks through the ovary wall and enters the ovule through micropyl
The tube disintegrates giving clear way for two male nuclei
isaacmuthini answered the question on October 14, 2017 at 09:35
-
Explain the process through which excretion takes place in plants
(Solved)
Explain the process through which excretion takes place in plants
Date posted:
October 14, 2017
.
Answers (1)
-
Explain the process of urea formation
(Solved)
Explain the process of urea formation
Date posted:
October 14, 2017
.
Answers (1)
-
State one factor that determines energy requirement in man
(Solved)
State one factor that determines energy requirement in man
Date posted:
October 14, 2017
.
Answers (1)
-
What happens to Amino acid and glucose when they reach the liver?
(Solved)
What happens to Amino acid and glucose when they reach the liver?
Date posted:
October 14, 2017
.
Answers (1)
-
What is nutrition?
(Solved)
What is nutrition?
Date posted:
October 14, 2017
.
Answers (1)
-
Explain the mechanism of exhalation in man
(Solved)
Explain the mechanism of exhalation in man
Date posted:
October 14, 2017
.
Answers (1)
-
Give two characteristics of phylum arthropoda.
(Solved)
Give two characteristics of phylum arthropoda.
Date posted:
October 13, 2017
.
Answers (1)
-
Explain the roles of diffusion in living organisms.
(Solved)
Explain the roles of diffusion in living organisms.
Date posted:
October 13, 2017
.
Answers (1)
-
Distinguish between a fine adjustment knob and a coarse adjustment knob in a light microscope.
(Solved)
Distinguish between a fine adjustment knob and a coarse adjustment knob in a light microscope.
Date posted:
October 13, 2017
.
Answers (1)
-
Define the term binomial nomenclature.
(Solved)
Define the term binomial nomenclature.
Date posted:
October 13, 2017
.
Answers (1)
-
What brings around colouring of urine?
(Solved)
What brings around colouring of urine?
Date posted:
October 13, 2017
.
Answers (1)
-
(a) How does excretion take place in plants? (b) Describe the role of the human skin in homeostasis.
(Solved)
(a) How does excretion take place in plants? (b) Describe the role of the human skin in homeostasis.
Date posted:
October 11, 2017
.
Answers (1)
-
State two roles of luteinising hormone in human reproduction.
(Solved)
State two roles of luteinising hormone and oestrogen in human reproduction
Date posted:
October 11, 2017
.
Answers (1)
-
Explain what would happen to excess amino acids in liver of a human being.
(Solved)
Explain what would happen to excess amino acids in liver of a human being.
Date posted:
October 11, 2017
.
Answers (1)
-
State three structural differences between arteries and veins.
(Solved)
State three structural differences between arteries and veins.
Date posted:
October 10, 2017
.
Answers (1)
-
Describe how a finned fish such as Tilapia moves in water.
(Solved)
Describe how a finned fish such as Tilapia moves in water.
Date posted:
October 10, 2017
.
Answers (1)
-
(a) Explain how each of the following factors affects the rate of photosynthesis: (i) Temperature (ii) Chlorophyll concentration (b) Describe the process of carbohydrates digestion inhuman beings.
(Solved)
(a) Explain how each of the following factors affects the rate of photosynthesis: (i) Temperature (ii) Chlorophyll concentration (b) Describe the process of carbohydrates digestion inhuman beings.
Date posted:
October 9, 2017
.
Answers (1)
-
State two characteristics of bacteria which are not found in other living organism
(Solved)
State two characteristics of bacteria which are not found in other living organism
Date posted:
October 9, 2017
.
Answers (1)
-
Describe the process of fertilization in flowering plants.
(Solved)
Describe the process of fertilization in flowering plants.
Date posted:
October 9, 2017
.
Answers (1)
-
Describe the role of hormones
in human menstrual cycle.
(Solved)
Menstruation cycle
Date posted:
October 9, 2017
.
Answers (1)