- resistance of organism to antibiotics, pesticides and drugs
- new varieties of bacteria are resistant to certain antibiotics such as penicillin
- houseflies and mosquitoes are resistant to DDT
lemass answered the question on March 14, 2019 at 15:42
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List the types of chromosomes
(Solved)
List the types of chromosomes
Date posted:
March 14, 2019
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Answers (1)
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What is moulting?
(Solved)
What is moulting?
Date posted:
March 12, 2019
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Answers (1)
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State the roles of placenta in humans.
(Solved)
State the roles of the placenta in humans.
Date posted:
March 12, 2019
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Answers (1)
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State two differences between biceps and muscles of the intestines.
(Solved)
State two differences between biceps and muscles of the intestines.
Date posted:
March 12, 2019
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Answers (1)
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Name two hormones involved in regulation of sugar in human body.
(Solved)
Name two hormones involved in regulation of sugar in human body.
Date posted:
March 12, 2019
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Answers (1)
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State three ways in which Ascaris lumbricoides adapted to living in its habitat.
(Solved)
State three ways in which Ascaris lumbricoides is adapted to living in its habitat.
Date posted:
March 12, 2019
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Answers (1)
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State two advantages of maintaining a constant body temperature in mammals.
(Solved)
State two advantages of maintaining a constant body temperature in mammals.
Date posted:
March 12, 2019
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Answers (1)
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What are the factors limiting primary productivity in an aquatic ecosystem?
(Solved)
What are the factors limiting primary productivity in an aquatic ecosystem?
Date posted:
March 12, 2019
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Answers (1)
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What is the effect of gibberellins on shoots of plants?
(Solved)
What is the effect of gibberellins on shoots of plants?
Date posted:
March 12, 2019
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Answers (1)
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State the major distinguishing feature of a cervical vertebra.
(Solved)
State the major distinguishing feature of a cervical vertebra.
Date posted:
March 12, 2019
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Answers (1)
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How does xylem tracheid differ from xylem vessel?
(Solved)
How does xylem tracheid differ from xylem vessel?
Date posted:
March 12, 2019
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Answers (1)
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Explain how the various specialized cells are modified to carry out their functions in plants and animals
(Solved)
Explain how the various specialized cells are modified to carry out their functions in plants and animals
Date posted:
March 12, 2019
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Answers (1)
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Explain the ways in which a typical cell is adapted to its functions.
(Solved)
Explain the various ways in which a typical cell is adapted to its functions
Date posted:
March 12, 2019
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Answers (1)
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State how the epithelial tissue is adapted to its function
(Solved)
State how the epithelial tissue is adapted to its function
Date posted:
March 10, 2019
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Answers (1)
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State two characteristics of division Bryophyta
(Solved)
State two characteristics of division Bryophyta.
Date posted:
March 10, 2019
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Answers (1)
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Explain why bile is an excretory product as well as a digestive secretion.
(Solved)
Explain why bile is an excretory product as well as a digestive secretion.
Date posted:
March 10, 2019
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Answers (1)
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State two ways of controlling schistosomiasis.
(Solved)
State two ways of controlling schistosomiasis.
Date posted:
March 10, 2019
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Answers (1)
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State three external characteristics that distinguish mammals from other vertebrates.
(Solved)
Stare three external characteristics that distinguish mammals from other vertebrates.
Date posted:
March 10, 2019
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Answers (1)
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What is meant by 'survival of the fittest'?
(Solved)
What is meant by 'survival of the fittest'?
Date posted:
March 10, 2019
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Answers (1)
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State the structures for gaseous exchange in the following organisms:
(i)Amoeba.
(ii)Butterfly.
(Solved)
State the structures for gaseous exchange in the following organisms:
(i)Amoeba.
(ii)Butterfly.
Date posted:
March 10, 2019
.
Answers (1)