Get premium membership and access questions with answers, video lessons as well as revision papers.
The viruses for example influenza and others mutate over time meaning they change over time making it hard to treat.
becker60 answered the question on April 29, 2018 at 11:46
- How are leaves of mesophytes adapted to their functions? (Solved)
How are leaves of mesophytes adapted to their functions?
Date posted: April 28, 2018. Answers (1)
- Why is it advisable to feed 100kg of grain to man instead of using it to fatten steers then supply beef to human population? (Solved)
Why is it advisable to feed 100kg of grain to man instead of using it to fatten steers then supply beef to human population?
Date posted: April 28, 2018. Answers (1)
- Explain how saliva is important in digestion. (Solved)
Explain how saliva is important in digestion.
Date posted: April 28, 2018. Answers (1)
- Name one main cause of global warming.(Solved)
Name one main cause of global warming.
Date posted: April 28, 2018. Answers (1)
- What is the importance of saprophytic fungi and bacteria in an ecosystem? (Solved)
What is the importance of saprophytic fungi and bacteria in an ecosystem?
Date posted: April 28, 2018. Answers (1)
- Describe how the belt transect can be used in estimating the population of a shrub in a grass land.(Solved)
Describe how the belt transect can be used in estimating the population of a shrub in a grass land.
Date posted: April 28, 2018. Answers (1)
- 50 black mice and 50 white mice were released in an area inhabited by a pair of owls. After four months, the mice in the...(Solved)
50 black mice and 50 white mice were released in an area inhabited by a pair of owls. After four months, the mice in the area were recaptured and only 38 black mice and only a white mice remained.
a) How would you explain these results?
b) Name the theory of evolution that support the results in (a) above.
Date posted: April 28, 2018. Answers (1)
- State two most important factors that favour exponential growth of a population of gazelle in a park.(Solved)
State two most important factors that favour exponential growth of a population of gazelle in a park.
Date posted: April 28, 2018. Answers (1)
- Using relevant examples explain the meaning of the following terms: (i) Adaptive radiation (ii) Convergent evolution (ii)Mutation(Solved)
(i) Adaptive radiation
(ii) Convergent evolution
(iii) Mutation
Date posted: April 28, 2018. Answers (1)
- Name two organelles in plants that can be seen under low power objective lens
(Solved)
Name two organelles in plants that can be seen under low power objective lens
Date posted: April 27, 2018. Answers (1)
- Describe the pumping mechanism of the heart
(Solved)
Describe the pumping mechanism of the heart
Date posted: April 25, 2018. Answers (1)
- Discuss five factors influencing photosynthesis.(Solved)
Discuss five factors influencing photosynthesis.
Date posted: April 25, 2018. Answers (1)
- Describe how natural selection brings about adaptations of a species to its environment(Solved)
Describe how natural selection brings about adaptations of a species to its environment.
Date posted: April 25, 2018. Answers (1)
- Explain why the companion cells are located next to the sieve tubes(Solved)
Explain why the companion cells are located next to the sieve tubes.
Date posted: April 24, 2018. Answers (1)
- Identify the external features of plants considered in classification (Solved)
Identify the external features of plants considered in classification
Date posted: April 24, 2018. Answers (1)
- What causes cancer?(Solved)
What causes cancer?
Date posted: April 24, 2018. Answers (1)
- What is the difference between artificial classification and modern classification (Solved)
What is the difference between artificial classification and modern classification
Date posted: April 24, 2018. Answers (1)
- Name the organelle that performs each of the following functions in a cell. (a) Transport of packaged glycoproteins (b) Destruction of worn out cell organelles (c) Synthesis(Solved)
Name the organelle that performs each of the following functions in a cell.
(a) Transport of packaged glycoproteins
(b) Destruction of worn out cell organelles
(c) Synthesis of proteins
Date posted: April 24, 2018. Answers (1)
- Why is it advisable for a woman to donate blood after every 3 months while a man can donate blood after every 4 months?(Solved)
Why is it advisable for a woman to donate blood after every 3 months while a man can donate blood after every 4 months?
Date posted: April 24, 2018. Answers (1)
- Explain how a leaf is tested for starch(Solved)
Explain how a leaf is tested for starch.
Date posted: April 23, 2018. Answers (1)