- Embryo may not have fully developed
- Presence of chemical inhibitors
- Low hormone and enzyme concentration
- Hard and impermeable seed coats
-Unfavourable environment factors
johnmulu answered the question on May 12, 2017 at 07:59
-
State four applications of plant hormones in agriculture.
(Solved)
State four applications of plant hormones in agriculture.
Date posted:
May 12, 2017
.
Answers (1)
-
During germination and early growth, the day weight of the endosperm decreases while that of the embryo increases. Explain
(Solved)
During germination and early growth, the day weight of the endosperm decreases while that of the embryo increases. Explain
Date posted:
May 12, 2017
.
Answers (1)
-
The diagram below represents a set up to investigate the conditions necessary for seed germination.
(Solved)
The diagram below represents a set up to investigate the conditions necessary for seed germination.
The set up was left for 7 days.
(a) What conditions were being investigated in the experiment?
(b) State three reasons for soaking seeds in set ups A and B.
(c) What were the expected results after seven days
Date posted:
May 12, 2017
.
Answers (1)
-
State two advantages of metarmorphosis to the life of insects.
(Solved)
State two advantages of metarmorphosis to the life of insects.
Date posted:
May 12, 2017
.
Answers (1)
-
A student set up an experiment as shown in the diagram below.
(Solved)
A student set up an experiment as shown in the diagram below.
The set up was at room temperature for a week.
(a) What was the aim of the experiment?
(b) What would be the expected results at the end of the experiment.
(c) Account for the observation made in set up A.
Date posted:
May 12, 2017
.
Answers (1)
-
The diagram below represents human foetus in a uterus.
(Solved)
The diagram below represents human foetus in a uterus.
(a) Name the part labeled S.
(b)(i) Name the types of blood vessels found in the structures labeled Q.
(ii) State the differences in composition of blood found in the vessels named in (b) above
(c) Name two features that enable the structure labelled P carry out its function
(d) State the role of the part labeled R.
Date posted:
May 12, 2017
.
Answers (1)
-
State three differences between the end products of mitosis and meiosis
(Solved)
State three differences between the end products of mitosis and meiosis
Date posted:
May 9, 2017
.
Answers (1)
-
State two functions of the placenta in mammals.
(Solved)
State two functions of the placenta in mammals.
Date posted:
May 9, 2017
.
Answers (1)
-
How is the human sperm cell structurally specialized?
(Solved)
How is the human sperm cell structurally specialized?
Date posted:
May 9, 2017
.
Answers (1)
-
Name two substances that leaves the foetal blood through the placenta.
(Solved)
Name two substances that leaves the foetal blood through the placenta.
Date posted:
May 9, 2017
.
Answers (1)
-
What name is given to a group of hormones that controls the development of secondary sexual characteristics in a human male
(Solved)
What name is given to a group of hormones that controls the development of secondary sexual characteristics in a human male
Date posted:
May 9, 2017
.
Answers (1)
-
The diagram below represents a human reproductive organ.
(Solved)
The diagram below represents a human reproductive organ.
(i) Explain two adaptations of the structure labeled L to its functions
(ii) Explain the role of the gland labeled K.
Date posted:
May 9, 2017
.
Answers (1)
-
Name the gamete cells that are produced by the ovaries
(Solved)
Name the gamete cells that are produced by the ovaries
Date posted:
May 9, 2017
.
Answers (1)
-
What is the function of the following structures in the human reproductive organs (a) Fallopian tubes. (b) Epididymis. (c) Scrotal sac
(Solved)
What is the function of the following structures in the human reproductive organs (a) Fallopian tubes. (b) Epididymis. (c) Scrotal sac
Date posted:
May 9, 2017
.
Answers (1)
-
State two advantages of internal fertilization in humans.
(Solved)
State two advantages of internal fertilization in humans.
Date posted:
May 9, 2017
.
Answers (1)
-
(a)Pregnancy continues if the ovary of an expectant mother is removed after the 4 th month. Explain.
(b) What is the role of the testes in the mammalian reproductive systems.
(Solved)
(a)Pregnancy continues if the ovary of an expectant mother is removed after the 4 th month. Explain.
(b) What is the role of the testes in the mammalian reproductive systems.
Date posted:
May 9, 2017
.
Answers (1)
-
The figure shows changes that take place during menstrual cycle in human.
(Solved)
The figure shows changes that take place during menstrual cycle in human.
(a) Name the hormone whose concentrations are represented by curves F and G.
(b) State the effects of the hormones named (a) above on the lining of the uterus.
Date posted:
May 9, 2017
.
Answers (1)
-
State a function of amniotic fluid.
(Solved)
State a function of amniotic fluid.
Date posted:
May 9, 2017
.
Answers (1)
-
State the mode of asexual reproduction in yeast.
(Solved)
State the mode of asexual reproduction in yeast.
Date posted:
May 9, 2017
.
Answers (1)
-
State two disadvantages of sexual reproduction in animals
(Solved)
State two disadvantages of sexual reproduction in animals
Date posted:
May 9, 2017
.
Answers (1)