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(i)Passive immunity is inborn, that is antibodies passed from mother or antibodies introduced through vaccination/short duration. Active immunity results after recovery from a disease.It lasts long.
(ii)A condition whereby the body's immune system has been compromised(attacked and weakened) by HIV/AIDS making the body susceptible to other opportunistic infections.
Belan answered the question on March 8, 2019 at 14:44
- Give two reasons why water lily have stomata on the upper epidermis only.(Solved)
Give two reasons why water lily have stomata on the upper epidermis only.
Date posted: March 6, 2019. Answers (1)
- (a)(i)State the function of companion cells.
(ii)Explain why companion cells are located next to the sieve tubes.(Solved)
(a)(i)State the function of companion cells.
(ii)Explain why companion cells are located next to the sieve tubes.
Date posted: March 6, 2019. Answers (1)
- Define the following terms:
(a)Tissue.
(b)Organ system.(Solved)
Define the following terms:
(a)Tissue.
(b)Organ system.
Date posted: March 6, 2019. Answers (1)
- State the method of dispersal for each of the following fruits:
(i)Orange.
(ii)Sonchus.
(iii)Coconut.
(b)Name the agent of dispersal for the following fruits:
(i)Orange.
(ii)Coconut.
(c)Name a seed dispersed by:
(i)wind.
(ii)Censor mechanism.(Solved)
(a)State the method of dispersal for each of the following:
(i)Orange.
(ii)Sonchus.
(iii)Coconut.
(b)Name the agent of dispersal for each of the following fruits:
(i)Orange.
(ii)Coconut.
(c)Name a seed dispersed by:
(i)Wind.
(ii)Censor mechanism.
Date posted: March 2, 2019. Answers (1)
- An experiment was carried out as follows:
-2cm³of egg white suspension was placed in each test tubes labelled A,B,C and D.
-Three drops of hydrochloric acid(HCI)was added...(Solved)
An experiment was carried out as follows:
-2cm³of egg white suspension was placed in each of the test tubes labelled A,B,C and D.
-Three drops of hydrochloric acid (HCI) was added to each of test tubes labelled B,C and D.
-1cm³pepsin was added to each of test tubes labelled A, and C 1cm³ boiled pepsin to test tube labelled D.
All the test tubes were placed in a water bath at 35°C for 15 minutes.
(a)State the observations made in each of the test tubes labelled A,B,C and D.
(b)Account for the observations made in(a) above for test tubes labelled A,B,C and D.
(c)What was the role of HCI?
Date posted: March 2, 2019. Answers (1)
- What are the advantages of excreting uric acid other than ammonia in a kangaroo rat?(Solved)
What are the advantages of excreting uric acid other than ammonia in a kangaroo rat?
Date posted: March 2, 2019. Answers (1)
- Give two reasons why pressure of blood is greater in arteries than in veins of animals.(Solved)
Give two reasons why pressure of blood is greater in arteries than in veins of animals.
Date posted: March 2, 2019. Answers (1)
- State two artificial ways of breaking seed dormancy.(Solved)
State two artificial ways of breaking seed dormancy.
Date posted: March 2, 2019. Answers (1)
- Explain why several lateral buds sprout when the terminal bud in a young tree is cut off.(Solved)
Explain why several lateral buds sprout when the terminal bud in a young tree is cut off.
Date posted: March 2, 2019. Answers (1)
- Trace the path taken by oxygen to reach the muscle cells in an insect.(Solved)
Trace the path taken by oxygen to reach the muscle cells in an insect.
Date posted: March 2, 2019. Answers (1)
- State one function of each of the following organelles:
(i)Lysosomes.
(ii)Ribosome.(Solved)
State one function of each of the following organelles:
(i)Lysosomes.
(ii)Ribosome.
Date posted: March 2, 2019. Answers (1)
- (i)Name the causative agent of pulmonary tuberculosis.(ii)How is the disease prevented?(Solved)
(i)Name the causative agent of pulmonary tuberculosis.
(ii)How is the disease prevented?
Date posted: March 2, 2019. Answers (1)
- Define the following terms:
(i)Peristalsis.
(ii)Emulsification.(Solved)
Define the following terms:
(i)Peristalsis.
(ii)Emulsification.
Date posted: March 2, 2019. Answers (1)
- Name two substances that are not filtered out of the blood in the glomerulus.(Solved)
Name two substances that are not filtered out of the blood in the glomerulus.
Date posted: March 2, 2019. Answers (1)
- State two physiological processes by which humans lose heat.(Solved)
State two physiological processes by which humans lose heat.
Date posted: March 2, 2019. Answers (1)
- What problems results from transpiration?(Solved)
What problems results from transpiration?
Date posted: March 2, 2019. Answers (1)
- Why do plant roots require oxygen for the uptake of ions?(Solved)
Why do plant roots require oxygen for the uptake of ions?
Date posted: March 2, 2019. Answers (1)
- Describe how a named finned fish is adapted for swimming.(Solved)
Describe how a named finned fish is adapted for swimming.
Date posted: March 2, 2019. Answers (1)
- What are the Harmful Effects of fungi?(Solved)
What are the Harmful Effects of fungi?
Date posted: February 28, 2019. Answers (1)
- What are the Economic importance of protoctista?(Solved)
What are the Economic importance of protoctista?
Date posted: February 28, 2019. Answers (1)