The insecticide kills most of the insects when introduced; those that survive; give rise to a new
generation of flies that are resistant to insecticide.
Kavungya answered the question on June 15, 2019 at 08:14
- Briefly explain the term “survival for the fittest” as used in Darwin’s theory of natural selection(Solved)
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Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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All insects are believed to have arisen from a common ancestor. However, modern insects differ widely in a variety of ways such as in the adaptation of their mouthparts for different modes of feeding. What kind of evolution is this?
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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Give two factors that determine water reabsorption in the distal convoluted tubule
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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State any two similarities in structure between Homo erectus and Homo Sapiens
Date posted: June 15, 2019. Answers (1)
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State role of cardiac sphincter in the stomach.
Date posted: June 15, 2019. Answers (1)
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Distinguish between camouflage and mimicry.
Date posted: June 15, 2019. Answers (1)
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Give two examples of adaptive radiation in animals.
Date posted: June 15, 2019. Answers (1)
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Name one method that would be used to estimate the population of small fish in the ecosystem
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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State three disadvantages of using synthetic pesticides over Biological control.
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
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Apart from mere observation of actual feeding suggest two methods that can be used to determine the type of food eaten by animals
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
- To estimate the population size of crabs in a certain lagoon, traps were laid at random. 400 crabs
were caught, marked and released back into the...(Solved)
To estimate the population size of crabs in a certain lagoon, traps were laid at random. 400 crabs
were caught, marked and released back into the lagoon. Four days later, traps were laid again and
360 crabs were caught. Out of the 360crabs, 90 were found to have been marked
(i) Calculate the population size of the crabs in the lagoon
(ii) What is the name given to this method of estimating the population size
Date posted: June 15, 2019. Answers (1)
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Date posted: June 15, 2019. Answers (1)
- A fish farmer wanted to know the number of fish in a pond. He collected 10 fish from the pond
and labeled each, by a tag...(Solved)
A fish farmer wanted to know the number of fish in a pond. He collected 10 fish from the pond
and labeled each, by a tag label on its fin and returned the ten fish to the pond to mix with
other fish . When he later collected 50 fish from the pond, he found only four of them had labels
a) Estimate the total number of fish in the pond (show your workings)
b) What two assumptions are being made in this methods of estimating population
Date posted: June 15, 2019. Answers (1)