The a crosome bursts open; releasing lytic enzyme that dissolve the egg membrane; a crosome turns inside out forming a sharp fine filament; which enables the sperm head penetrate the eggs/ovum for fertilization;
lydiajane74 answered the question on November 15, 2017 at 23:25
-
State the role played by jelly like substances surrounding egg laid by frogs.
(Solved)
State the role played by jelly like substances surrounding egg laid by frogs
Date posted:
November 15, 2017
.
Answers (1)
-
(a) Ascaris lumbroides is an endo-parasite living in the ileum of human beings, while Tagetes minutes is a notorious weed in our farms. Identify the generic...
(Solved)
(a) Ascaris lumbroides is an endo-parasite living in the ileum of human beings, while Tagetes minutes is a notorious weed in our farms. Identify the generic parts of the organisms mentioned.(b) Under which circumstances are two organisms considered to belong to same species.
Date posted:
November 15, 2017
.
Answers (1)
-
The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.
(Solved)
The lungs and ileum are adapted for absorption. State three features they have in common which facilitate absorption.
Date posted:
November 15, 2017
.
Answers (1)
-
Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of...
(Solved)
Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip A was placed in a solution of 10% sugar concentration while strip B was placed in 50% sugar concentration. a) What change was expected in strips A and B?
Date posted:
November 15, 2017
.
Answers (1)
-
Explain why most athletes practice in highland regions?
(Solved)
Explain why most athletes practice in highland regions?
Date posted:
November 15, 2017
.
Answers (1)
-
Name the organelle in which energy production takes place.
(Solved)
Name the organelle in which energy production take place.
Date posted:
November 15, 2017
.
Answers (1)
-
What is excretion?
(Solved)
What is excretion?
Date posted:
November 15, 2017
.
Answers (1)
-
State the reason why digestion of starch does not take place in the stomach.
(Solved)
State the reason why digestion of starch does not take place in the stomach.
Date posted:
November 15, 2017
.
Answers (1)
-
Describe the sequences of events that occur in the eye for one to be able to see clearly if one moves from a dark room...
(Solved)
Describe the sequences of events that occur in the eye for one to be able to see clearly if one moves from a dark room to a bright light.
Date posted:
November 14, 2017
.
Answers (1)
-
Explain why an athlete after winning 100 meters race breath move quickly and deeply.
(Solved)
Explain why an athlete after winning 100 metres race breath move quickly and deeply.
Date posted:
November 14, 2017
.
Answers (1)
-
Explain why amoeba does not have a specialized structure for gaseous exchange.
(Solved)
Explain why amoeba does not have a specialized structure for gaseous exchange.
Date posted:
November 14, 2017
.
Answers (1)
-
Why is that a father can only transmit haemophilia to his daughter but not to his son?
(Solved)
Why is that a father can only transmit haemophilia to his daughter but not to his son?
Date posted:
November 14, 2017
.
Answers (1)
-
Name the branch of biology that deals with the study of cells in the body of organisms.
(Solved)
Name the branch of biology that deals with the study of cells in the body of organisms.
Date posted:
November 14, 2017
.
Answers (1)
-
What is symbiosis?
(Solved)
What is symbiosis?
Date posted:
November 13, 2017
.
Answers (1)
-
State two role of hydrochloric acid in the digestion food
(Solved)
State two role of hydrochloric acid in the digestion food
Date posted:
November 13, 2017
.
Answers (1)
-
Explain why a father is the determinant of the sex of a child and not the mother
(Solved)
Explain why a father is the determinant of the sex of a child and not the mother
Date posted:
November 12, 2017
.
Answers (1)
-
Explain two ways of determining an unknown genotype of a particular plant variety
(Solved)
Explain two ways of determining an unknown genotype of a particular plant variety
Date posted:
November 12, 2017
.
Answers (1)
-
Discuss the mechanisms of desert mammals towards water conservation.
(Solved)
Discuss the mechanisms of desert mammals towards water conservation
Date posted:
November 12, 2017
.
Answers (1)
-
State and explain four diseases that affect the circulatory system.
(Solved)
State and explain four diseases that affect the circulatory system.
Date posted:
November 12, 2017
.
Answers (1)
-
Give four differences between the DNA and the RNA molecules.
(Solved)
Give four differences between the DNA and RNA molecules
Date posted:
November 12, 2017
.
Answers (1)