Get premium membership and access questions with answers, video lessons as well as revision papers.
(a) Acquired characteristics;
(b) Lamarck?s theory/Lamarckism/Theory of use and disuse;
(c) Acquired characteristics are not passed to offsprings;
-This is because acquired characteristics do not affect genes.
sharon kalunda answered the question on September 13, 2019 at 10:35
- The table below shows differences in air breathed in and out.(Solved)
The table below shows differences in air breathed in and out.
What is the reason for there differences.
Date posted: September 13, 2019. Answers (1)
- Which substance in the cigarettes smoke may cause lung cancer.(Solved)
Which substance in the cigarettes smoke may cause lung cancer.
Date posted: September 13, 2019. Answers (1)
- Mr. Juma has sued Serenity Hospital on grounds that their child was wrongly identified such that they got the wrong one.The child is blood group...(Solved)
Mr. Juma has sued Serenity Hospital on grounds that their child was wrongly identified such that they got the wrong one.The child is blood group O. Mr. Juma is blood group AB while Mrs. Juma is heterozygous blood group A.
(a) Work out the possible blood group of their offsprings.
(b) Is Mr. Juma justified in his claims?
Date posted: September 13, 2019. Answers (1)
- The diagram below show single circulation of a fish.(Solved)
The diagram below show single circulation of a fish.
(a) Write down the names of the parts labelled T,U and V.
(b) Explain the main disadvantage of this type of circulation.
(c) How is this type of circulation different from that found in man?
Date posted: September 13, 2019. Answers (1)
- The table below shows approximate numbers of organisms found in an ecosystem.(Solved)
The table below shows approximate numbers of organisms found in an ecosystem.
(a) Using the information in the table draw a pyramid of numbers.
(b) Explain what would happen to the other organisms if all the lizards suddenly died off.
Date posted: September 13, 2019. Answers (1)
- The photographs labelled K, L, M, N and P below are bones obtained from a mammal. For each of the bones K, L and M,...(Solved)
The photographs labelled K, L, M, N and P below are bones obtained from a mammal. For each of the bones K, L and M, two views are shown.
(a) Identify the bones and name the part of the mammalian body from which each was obtained. (5mks)
(b) Name the parts labelled 1, 2 and 4.
(c) Name the bones that form a joint with bone K at its anterior and posterior end
and in each case name the type of joint they form.
Anterior end.
(i) Bone(s)
(ii) Type of joint
Posterior end.
(i) Bone(s)
(ii) Type of joint
(d) State the function of the structure labelled 6 in bone P.
Date posted: September 13, 2019. Answers (1)
- Name the hard body covering found in organisms of the phylum arthropoda.(Solved)
Name the hard body covering found in organisms of the phylum arthropoda.
Date posted: September 13, 2019. Answers (1)
- Write the kingdoms to which the following organisms belong.
Plasmodium
Bat
Yeast(Solved)
Write the kingdoms to which the following organisms belong.
Plasmodium
Bat
Yeast
Date posted: September 13, 2019. Answers (1)
- A student collected a plant with the following features:
-Vascular bundles in the stem were scattered with no cambium.
-Fibrous root system.
Name the sub-division and the class...(Solved)
A student collected a plant with the following features:
-Vascular bundles in the stem were scattered with no cambium.
-Fibrous root system.
Name the sub-division and the class to which the above plant belonged.
Sub-division
Class
Date posted: September 13, 2019. Answers (1)
- Name one waste product that is transported in the blood but not removed by the kidneys.(Solved)
Name one waste product that is transported in the blood but not removed by the kidneys.
Date posted: September 13, 2019. Answers (1)
- Arrange the following nitrogenous waste products in order of decreasing toxicity:
urea, uric acid and ammonia.(Solved)
Arrange the following nitrogenous waste products in order of decreasing toxicity:
urea, uric acid and ammonia.
Date posted: September 13, 2019. Answers (1)
- Name two substances that are excreted through diffusion process in plants.(Solved)
Name two substances that are excreted through diffusion process in plants.
Date posted: September 13, 2019. Answers (1)
- Explain why the garden pea plant was preferred by Gregor Mendel in his crossing experiments.(Solved)
Explain why the garden pea plant was preferred by Gregor Mendel in his crossing experiments.
Date posted: September 13, 2019. Answers (1)
- Potato cylinders were weighed and kept in distilled water overnight. They were then reweighed.(Solved)
Potato cylinders were weighed and kept in distilled water overnight. They were then reweighed.
(a) Calculate the average mass of the potato cylinders at the end of the experiments.(Show your working).
(b) Explain why the mass of the cylinders had increased.
Date posted: September 13, 2019. Answers (1)
- What is the importance of fixation in preparation of temporary slide?(Solved)
What is the importance of fixation in preparation of temporary slide?
Date posted: September 13, 2019. Answers (1)
- Give one structural difference and similarity between a mitochondrion and a chloroplast.(Solved)
Give one structural difference and similarity between a mitochondrion and a chloroplast.
Date posted: September 13, 2019. Answers (1)
- Explain why athletes practicing at high altitude zones have a higher number red blood cells than those at sea level.(Solved)
Explain why athletes practicing at high altitude zones have a higher number red blood cells than those at sea level.
Date posted: September 13, 2019. Answers (1)
- Below is across section of a fruit.(Solved)
Below is across section of a fruit.
(a) Name the type of placentation shown.
(b) Identify the parts labelled A.
Date posted: September 13, 2019. Answers (1)
- Explain why emulsification is not a chemical digestion.(Solved)
Explain why emulsification is not a chemical digestion.
Date posted: September 13, 2019. Answers (1)
- The diagram below shows a transverse section of a spinal cord.(Solved)
The diagram below shows a transverse section of a spinal cord.
Name the parts labelled A – D.
Date posted: September 13, 2019. Answers (1)