identity- ribonucleic acid
Reason- presence of organic base uracil
marto answered the question on October 9, 2019 at 08:32
- The table below shows the percentage composition by volume of inhaled and exhaled air.(Solved)
The table below shows the percentage composition by volume of inhaled and exhaled air.
(a) By what percentage is carbon (iv) oxide concentration in inhaled air higher than exhaled air.
(b) Explain the differences in the composition of the gases between inhaled and exhaled air.
Date posted: October 9, 2019. Answers (1)
- In a blood test, a few drops of anti- serum were added to two samples of blood. It was observed that agglutination occurred. What were...(Solved)
In a blood test, a few drops of anti- serum were added to two samples of blood. It was observed that agglutination occurred. What were the possible blood groups of the two blood samples?
Date posted: October 9, 2019. Answers (1)
- The following is a diagrammatic representation of protein synthesis. Study and answer the questions that follow.(Solved)
The following is a diagrammatic representation of protein synthesis. Study and answer the questions that follow.
(a) Name process R
(b) Where in the cell does R take place?
(c) Name
(i) Product Q
(ii) Part X
Date posted: October 9, 2019. Answers (1)
- Name the parts of the body of a mammal where each of the following types of joints are found.(Solved)
Name the parts of the body of a mammal where each of the following types of joints are found.
(i) Fixed joints
(ii) Gliding joint
(ii) Huge joint
Date posted: October 9, 2019. Answers (1)
- a0When observing a specimen through a light microscope, a student noted that the field of view was dark. Name 2 parts of the microscope that...(Solved)
a)When observing a specimen through a light microscope, a student noted that the field of view was dark. Name 2 parts of the microscope that the student should adjust to make the field of view clear.
b) A specimen was magnified 1000 times by a light microscope whose eye piece lens magnification is x10. Calculate magnification of objective lens.
Date posted: October 9, 2019. Answers (1)
- The following graph represents a growth pattern observed in a group of animal.(Solved)
The following graph represents a growth pattern observed in a group of animal.
a) Name the type of growth shown above.
b) Name the phylum of animals whose members display the growth pattern named in (a) above.
c) Identify the process which leads to increase in body size at the part marked S.
Date posted: October 9, 2019. Answers (1)
- Explain how each of the following serves as evidence of organic evolution
(i) Fossil records
(ii) Comparative antinomy
(iii) Geographical distribution(Solved)
Explain how each of the following serves as evidence of organic evolution
(i) Fossil records
(ii) Comparative antinomy
(iii) Geographical distribution
Date posted: October 9, 2019. Answers (1)
- State the possible application of the following plants hormones in agriculture
(i) Auxins
(ii) Gibberellins(Solved)
State the possible application of the following plants hormones in agriculture
(i) Auxins
(ii) Gibberellins
Date posted: October 9, 2019. Answers (1)
- The table below shows how the width of the stomata and the wind speed can affect the rate of transpiration from a leaf of a...(Solved)
The table below shows how the width of the stomata and the wind speed can affect the rate of transpiration from a leaf of a plant. The width are measured in micrometers (nm)
a)plot a graph of rate of transpiration against width of the stomata.
(b) Use your graph to predict the rate of transpiration when the stomata have a width of 8nm.
(c) Describe the relationship between the width of stomata and the rate of transpiration in still air.
(d) Explain why the rate of transpiration in wind differs from rate in still air.
(e) Explain why transpiration is important in plants.
Date posted: October 9, 2019. Answers (1)
- The diagram below represents a transverse section through mammalian skin.(Solved)
The diagram below represents a transverse section through mammalian skin.
(a) Name the structures A and B .
A
B
(b) (i) Explain how the hair in human beings helps in keeping the body warm .
(ii) Explain other methods by which the skin helps to keep the body warm.
Date posted: October 9, 2019. Answers (1)
- The following is a diagrammatic representation of a dissection of a rabbit showing the urinogenital system.(Solved)
The following is a diagrammatic representation of a dissection of a rabbit showing the urinogenital system.
a)name the structures labeled P, Q, S and T. For each of the structures, state one function.
b)
i) Identify the sex of the rabbit that was dissected
ii) Give two reasons for your answer in b(i) above
c) Name the instrument labeled x in the diagram above
Date posted: October 8, 2019. Answers (1)
- Name one human disease caused by each of the following parasites.
(a) Plasmodium falciparum
(b) Entamoeba histolytica(Solved)
Name one human disease caused by each of the following parasites.
(a) Plasmodium falciparum
(b) Entamoeba histolytica
Date posted: October 8, 2019. Answers (1)
- Below are diagrams of disease causing micro-organisms. Use them to answer the questions that follow.(Solved)
Below are diagrams of disease causing micro-organisms. Use them to answer the questions that follow.
(a) State the kingdom to which they are found
(b) Name the diseases caused by the organisms: A and B
(c) State one way in which the disease named for organism B can be prevented
Date posted: October 8, 2019. Answers (1)
- Study the diagram below and answer the questions which follow.(Solved)
Study the diagram below and answer the questions which follow.
i) Identify the muscle represented by X and Y
ii) Describe how muscles x and y cause straightening of the joint z
iii) Name the joint z
Date posted: October 8, 2019. Answers (1)
- The diagram below represents a bone obtained form a mammal.(Solved)
The diagram below represents a bone obtained form a mammal.
(a) Identify the bone
(b) Name the structures labeled X and W
(c) Name the bone that articulate with structure labeled Z
Date posted: October 8, 2019. Answers (1)
- The diagram below represents a bone obtained from a mammalian skeleton.(Solved)
The diagram below represents a bone obtained from a mammalian skeleton.
(a) Identify the bone
(b) Name the:
(i) Bone it articulates with at point A
(ii) Type of joint that forms at point B in articulation with other bones
Date posted: October 8, 2019. Answers (1)
- The diagram below represents the anterior view of a rib.(Solved)
The diagram below represents the anterior view of a rib.
Date posted: October 8, 2019. Answers (1)
- Give three importance of mammalian skeleton.(Solved)
Give three importance of mammalian skeleton.
Date posted: October 8, 2019. Answers (1)
- How does vascular bundles contribute to support in plants?(Solved)
How does vascular bundles contribute to support in plants?
Date posted: October 8, 2019. Answers (1)
- State the role of lignin in the wall of the xylem vessel.(Solved)
State the role of lignin in the wall of the xylem vessel.
Date posted: October 8, 2019. Answers (1)