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- Red blood cells from a rabbit were placed in a petri dish containing a certain solution. A drop from the petri dish was then mounted...(Solved)
Red blood cells from a rabbit were placed in a petri dish containing a certain solution. A drop from the petri dish was then mounted on a slide and observed under a light microscope after 20 minutes.He made the drawings below.
a) Name solution Y
b) What term is to is describe the process that took place.
Date posted: September 17, 2019. Answers (1)
- What is the process that leads to addition or loss of one or more chromosomes?(Solved)
What is the process that leads to addition or loss of one or more chromosomes?
Date posted: September 17, 2019. Answers (1)
- During a field study, a student at Muringa secondary school collected a certain organisms whose actual length was four centimeters. He made a drawing of...(Solved)
During a field study, a student at Muringa secondary school collected a certain organisms whose actual length was four centimeters. He made a drawing of the organism whose length was 12cm. Calculate the magnification of the drawing.
Date posted: September 17, 2019. Answers (1)
- State the roles of paired fins in a bony fish.(Solved)
State the roles of paired fins in a bony fish.
Date posted: September 17, 2019. Answers (1)
- Identify the type of immunity given When a young child suffers from measles and recovers from it.(Solved)
Identify the type of immunity given When a young child suffers from measles and recovers from it.
Date posted: September 17, 2019. Answers (1)
- Identify the type of immunity given When a baby obtains antibodies through breastfeeding.(Solved)
Identify the type of immunity given When a baby obtains antibodies through breastfeeding.
Date posted: September 17, 2019. Answers (1)
- State the difference between a cell wall and a cell membrane.(Solved)
State the difference between a cell wall and a cell membrane.
Date posted: September 17, 2019. Answers (1)
- Study the diagram below and answer the questions that follow.(Solved)
Study the diagram below and answer the questions that follow.
a) Identify the apparatus.
b) State the functions of the part labeled x.
Date posted: September 17, 2019. Answers (1)
- The diagram below represents a certain stage in cell division.(Solved)
The diagram below represents a certain stage in cell division.
a) i) Identify the type of cell division.
ii) Give reasons for your answer in a(i) above.
b) State the stage of cell division shown in the diagram above.
Date posted: September 17, 2019. Answers (1)
- Name the plant hormone that is involved in topic responses.(Solved)
Name the plant hormone that is involved in topic responses.
Date posted: September 17, 2019. Answers (1)
- Which field of biology deals with the Study of interrelationship of living things in their surroundings.(Solved)
Which field of biology deals with the Study of interrelationship of living things in their surroundings.
Date posted: September 17, 2019. Answers (1)
- The equation below represents a certain biological process.(Solved)
The equation below represents a certain biological process.
a) Name the process Q
b) Identify substance R
Date posted: September 17, 2019. Answers (1)
- Part of one strand of a DNA molecule was found to have the following sequence. Show the complementary strand G-C-C-A-G-A-T-C-A-C(Solved)
Part of one strand of a DNA molecule was found to have the following sequence. Show the complementary strand G-C-C-A-G-A-T-C-A-C
Date posted: September 17, 2019. Answers (1)
- The following figure represents the forelimbs of certain animal species. Study them and answer the questions that follow.(Solved)
The following figure represents the forelimbs of certain animal species. Study them and answer the questions that follow.
a) Name the parts labeled E, F and G.
b) Name the type of joint at point K
c) Which features represent
i) Analogous structures
ii) Homologous structures
iii) Give a reason for (ii) above
d) i) What are vestigial organs?
ii) Give two examples of vestigial organs in Humans
e) State the type of skeleton found;
i) In figure I
ii) On the part labeled S on figure 3
Date posted: September 17, 2019. Answers (1)
- Photographs below represent specimen taken from three species of plants.(Solved)
Photographs below represent specimen taken from three species of plants.
i) Describe the androecium in specimen N1
ii) Identify the class to which the specimen N1 and B belong. Give a reason in each case.
Specimen N1……
Reason…..
Specimen B
Reason……
iii) Suggest the agent of pollination of the specimens N1 and N2
iv) Give reasons for your answer in a (iii) above.
v) Label non-essential part of the flower of specimen N2.
b) With a reason state the agent of pollination of the flower in specimen.
Date posted: September 17, 2019. Answers (1)
- The set apparatus was assembled by a group of students to investigate some physiological process.(Solved)
The set apparatus was assembled by a group of students to investigate some physiological process.
a) i) Give two aims of the experiment.
ii) Explain observations expected after 24hrs.
b) Before the experiment, the glucose was boiled the cooled.
i) Why was it necessary to boil the solution?
ii) What was the importance of the oil layer in the experiment?
c) Describe a control experiment for the set up?
d) Suggest one industrial application of the process being investigated?
Date posted: September 17, 2019. Answers (1)
- In an experiment, three healthy rabbits were fed with equal amounts of carbohydrates. After 1 hour their blood sugar glucose concentration was measured at 30...(Solved)
In an experiment, three healthy rabbits were fed with equal amounts of carbohydrates. After 1 hour their blood sugar glucose concentration was measured at 30 minutes intervals for 3 hour. The results are as shown in the table below.
a.(i) Calculate the mean glucose concentration 1mg/ml of blood at 60 and 180 minutes.
(ii) On the grid provided plot a graph of mean glucose concentration against time.
(iii) What was the mean concentration in the blood after 75 minutes?
(iv)Why was it necessary to use 3 rabbits in the experiment?
v) Account for differences in mean glucose concentration between initial time and 180 minutes.
(b) Name three products of digestion other than glucose
(c) What is the fate of excess glucose in:
(i) Plants?
(ii) Animals ?
Date posted: September 17, 2019. Answers (1)
- The diagram below represents a neurone.(Solved)
The diagram below represents a neurone.
a) Name the neurone shown in the above diagram.
b) State the functions of parts labeled N and M.
c) Using an arrow indicate the direction of impulse transmission on the diagram.
Date posted: September 17, 2019. Answers (1)
- Give two reasons why the evolution of human enabled him to survive better than his hominid ancestors.(Solved)
Give two reasons why the evolution of human enabled him to survive better than his hominid ancestors.
Date posted: September 17, 2019. Answers (1)
- The diagram below shows a section through the mammalian skin.(Solved)
The diagram below shows a section through the mammalian skin.
a. Name the parts labeled Y and X
b. State the function of the parts labeled W and Z
c. Explain the changes that occur on the skin when it is cold
Date posted: September 17, 2019. Answers (1)