– Have a notochord at least in their developmental stages/embryonic stage.
- Have a single dorsal nerve cord/spinal cord (enlarged to form the brain)
- Have segmented muscle blocks/Myotomes
- Have closed circulatory system with a ventrally located heart;
sharon kalunda answered the question on May 29, 2019 at 05:58
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A form three on a field trip collected termites and brought them to the laboratory. State two characteristics features thatwould enable her to group them...
(Solved)
A form three on a field trip collected termites and brought them to the laboratory. State two characteristics features that would enable her to group them under phylum arthropoda.
Date posted:
May 29, 2019
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Answers (1)
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Give a reason why ammonia is converted to urea.
(Solved)
Give a reason why ammonia is converted to urea.
Date posted:
May 29, 2019
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Answers (1)
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The diagram below shows half a flower.
(a) Identify the structure that develop into a fruit wall after fertilization.
(b) Name the structure labelled B and...
(Solved)
The diagram below shows half a flower.
(a) Identify the structure that develop into a fruit wall after fertilization.
(b) Name the structure labelled B and F.
(c) What is the function of the structure labelled G?
Date posted:
May 28, 2019
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Answers (1)
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How do the etiolated plant differ from the normal plant?
(Solved)
How do the etiolated plant differ from the normal plant?
Date posted:
May 28, 2019
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Answers (1)
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Name the part of an organelle where the Photolysis of water occur;
(Solved)
Name the part of an organelle where the Photolysis of water occur;
Date posted:
May 28, 2019
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Answers (1)
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Name the part of an organelle where the Carbon IV oxide fixation occur;
(Solved)
Name the part of an organelle where the Carbon IV oxide fixation occur;
Date posted:
May 28, 2019
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Answers (1)
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Explain why Blood group AB is a universal recipient.
(Solved)
Explain why Blood group AB is a universal recipient.
Date posted:
May 28, 2019
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Answers (1)
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Explain why Blood group O is a universal donor.
(Solved)
Explain why Blood group O is a universal donor.
Date posted:
May 28, 2019
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Answers (1)
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Below are photographs of specimens obtained from plants. Examine the photographs.
(a) For each of the specimens, name the mode of pollination and the features that...
(Solved)
Below are photographs of specimens obtained from plants. Examine the photographs.
(a) For each of the specimens, name the mode of pollination and the features that adapt the spaciments to the mode of pollination.
Specimen R
- Mode of pollination.
- Adaptive features.
Specimen S1
- Mode of pollination.
- Adaptive features.
(b) Label any four parts on specimen R.
(c) Name the structure labeled X on specimen S1.
(d) Using observable features only state two differences between R and S1.
(e) With a reason, name the class of the spermatophyta to which specimen R and S2 belongs.
Specimen R.
Class
Reason
Specimen S2.
Class
Reason
Date posted:
May 28, 2019
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Answers (1)
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a)Construct a dichotomous key to key out the following organisms using the following steps
Step 1: Body covering
Step 2: Animal with 3pairs of walking limbs or...
(Solved)
a)Construct a dichotomous key to key out the following organisms using the following steps
Step 1: Body covering
Step 2: Animal with 3pairs of walking limbs or more
Step 3: Animals with four pairs of legs
Step 4 : Number of walking limbs per segment.
b) With reasons state the class to which the organisms belong.
i) S. gregaria
ii) S. coleopata
Date posted:
May 28, 2019
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Answers (1)
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a)A student from Kegonga used a microscope with X40 objective lens and X5 eye piece lens which had 2mm radius and
counted 5 cells. Calculate the...
(Solved)
a)A student from Kegonga used a microscope with X40 objective lens and X5 eye piece lens which had 2mm radius and
counted 5 cells. Calculate the area of the field of view in micrometers.
b) What is the average size of the cell in micrometers?
Date posted:
May 28, 2019
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Answers (1)
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The diagrams below shows leaves obtained from five different plants.
Using the key provided identify the plants from which the leaves were obtained in each case...
(Solved)
The diagrams below shows leaves obtained from five different plants.
Using the key provided identify the plants from which the leaves were obtained in each case give the sequence of steps in the key which you followed to arrive at the identify.
1 (a) Leaf simple -------------------------------------------------------------- go to 2
(b) Leaf compound ---------------------------------------------------------------- go to 4
2. (a) Leaf with parallel veins------------------------------------------------------- Maize
(b) Leaf with network vein ------------------------------------------------------- go to 3
3. (a) Leaf margin smooth ---------------------------------------------------- Bougainvillea
(b) Leaf margin serrated ---------------------------------------------------------- Hibiscus
4. (a) Leaflets emerging from one stalk like fingers ------------------------ Bombax
(b) Leaflets emerging from several stalk attached to main stalk-------- Acacia
(b) State three differences between the classes from which leaf A and leaf B were obtained from.
Date posted:
May 28, 2019
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Answers (1)
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In an ecological study a certain insect population and that of predators was estimated in a certain grassland over a period of 1 year (one...
(Solved)
In an ecological study a certain insect population and that of predators was estimated in a certain grassland over a period of 1 year (one year).
(a) Using the information above plot on the same axis the graph of number of insects and number of predators against time in months.
(b) Suggest what happens to the insect’s population during dry months.
(c) Explain the relationship between the insect population and that of predators.
(d) Suggest what happens to the predator’s population during dry month.
(e) Name the trophic level occupied by:-
(i) Predator
(ii) Insects
(iii) Grass
(f) Name the method used to estimate population of:
(i) Predator
(ii) Insects
(iii) Grass
Date posted:
May 28, 2019
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Answers (1)
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What is the function of enzyme Enterokinase?
(Solved)
What is the function of enzyme Enterokinase?
Date posted:
May 28, 2019
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Answers (1)
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Define a fossil.
(Solved)
Define a fossil.
Date posted:
May 28, 2019
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Answers (1)
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Students set up an experiment as shown below. Use it to answer the questions that follow.
(a) What was the aim of the experiment?
(b) What...
(Solved)
Students set up an experiment as shown below. Use it to answer the questions that follow.
(a) What was the aim of the experiment?
(b) What observation would be made in test tube B?
(c) Explain the results in (b) above.
(d) Write word equation for the process of anaerobic respiration in plants.
(e) State four application of anaerobic respiration.
Date posted:
May 28, 2019
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Answers (1)
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In fruit flies (Drosophila melanongaster) inheritance of eye colour is sex linked. The gene for red eye is dominant.
Across was made between homozygous red eyed...
(Solved)
In fruit flies (Drosophila melanongaster) inheritance of eye colour is sex linked. The gene for red eye is dominant.
Across was made between homozygous red eyed female and white eyed male. Work out the phenotypic ratio of F1
generation. (Use R to represent gene for red eyes).
Date posted:
May 28, 2019
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Answers (1)
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What is tissue fluid?
(Solved)
What is tissue fluid?
Date posted:
May 28, 2019
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Answers (1)
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The apparatus below are used to investigate an aspect of photosynthesis.
(a) Name the aspect of photosynthesis being investigated.
(b) How can one verify the identity...
(Solved)
The apparatus below are used to investigate an aspect of photosynthesis.
(a) Name the aspect of photosynthesis being investigated.
(b) How can one verify the identity of the gas that accumulates in test tube?
(c) State the role of sodium hydrogen carbonate.
(d) What environmental factor are required in order to give positive results?
Date posted:
May 28, 2019
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Answers (1)
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State three distinguishing features of mammalian rib bone.
(Solved)
State three distinguishing features of mammalian rib bone.
Date posted:
May 28, 2019
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Answers (1)