Struggle for existence –environmental pressure on the population in order to survive;
Survival for the fittest-advantageous variations an individual possesses to make it survive
Kavungya answered the question on June 15, 2019 at 08:03
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State any two similarities in structure between Homo erectus and Homo Sapiens
(Solved)
State any two similarities in structure between Homo erectus and Homo Sapiens
Date posted:
June 15, 2019
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Answers (1)
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State role of cardiac sphincter in the stomach.
(Solved)
State role of cardiac sphincter in the stomach.
Date posted:
June 15, 2019
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Answers (1)
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Distinguish between camouflage and mimicry.
(Solved)
Distinguish between camouflage and mimicry.
Date posted:
June 15, 2019
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Give two examples of adaptive radiation in animals.
(Solved)
Give two examples of adaptive radiation in animals.
Date posted:
June 15, 2019
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Name one method that would be used to estimate the population of small fish in the ecosystem
(Solved)
Name one method that would be used to estimate the population of small fish in the ecosystem
Date posted:
June 15, 2019
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Answers (1)
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State the role of Leguminous plants in an ecosystem
(Solved)
State the role of Leguminous plants in an ecosystem
Date posted:
June 15, 2019
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State three disadvantages of using synthetic pesticides over Biological control.
(Solved)
State three disadvantages of using synthetic pesticides over Biological control.
Date posted:
June 15, 2019
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Answers (1)
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Describe how a population of grasshoppers in a given area can be estimated
(Solved)
Describe how a population of grasshoppers in a given area can be estimated
Date posted:
June 15, 2019
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Answers (1)
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Explain how food as a factor regulates the population of animals in an ecosystem
(Solved)
Explain how food as a factor regulates the population of animals in an ecosystem
Date posted:
June 15, 2019
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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
(Solved)
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
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Answers (1)
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What are the two main components of an ecosystem?
(Solved)
What are the two main components of an ecosystem?
Date posted:
June 15, 2019
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Answers (1)
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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
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Answers (1)
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What do you understand by the term trophic level?
(Solved)
What do you understand by the term trophic level?
Date posted:
June 15, 2019
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Answers (1)
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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
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Answers (1)
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An investigation was carried out on a terrestrial ecosystem. The population sizes and species biomass were determined and recorded as shown in the table...
(Solved)
An investigation was carried out on a terrestrial ecosystem. The population sizes and species
biomass were determined and recorded as shown in the table
a) If these organisms had a feeding relationship, construct a simple food chain involving all the organisms
b) Construct pyramid of numbers using the data provided above
c) State one disadvantage of using pyramid of number in expressing feeding relationships in ecological ecosystem
Date posted:
June 15, 2019
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Answers (1)
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In a certain school Form three class did an experiment to estimate the number of Tilapia
in their fish pond. 725 tilapia were netted marked and...
(Solved)
In a certain school Form three class did an experiment to estimate the number of Tilapia
in their fish pond. 725 tilapia were netted marked and released.
a) State the method used in this exercise
b) Calculate the tilapia population.
c) State two assumptions made by the students during the investigation
Date posted:
June 15, 2019
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Answers (1)
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Use the food web below to answer the questions that follow:-
(a) Construct a food chain ending with crocodile as a quartenary consumer
(b) Name the organisms...
(Solved)
Use the food web below to answer the questions that follow:-
(a) Construct a food chain ending with crocodile as a quartenary consumer
(b) Name the organisms in the food web hat has only one predator
Date posted:
June 15, 2019
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Answers (1)
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Explain how oil as a pollutant may affect aquatic plants and animals.
(Solved)
Explain how oil as a pollutant may affect aquatic plants and animals.
Date posted:
June 15, 2019
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Answers (1)
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State the advantage of a biological control method over the chemical control method of pests and parasites
(Solved)
State the advantage of a biological control method over the chemical control method of pests and parasites
Date posted:
June 15, 2019
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Answers (1)
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Explain why Biomass of producers is greater than that of primary consumers in a balanced ecosystem.
(Solved)
Explain why Biomass of producers is greater than that of primary consumers in a balanced ecosystem.
Date posted:
June 15, 2019
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Answers (1)