a) i) Small intestines/ileum;
ii) Presence of finger like projections (Villi)
b) i) Absorption of products of digestion (example glucose, vitamins)
Its walls secret mucus that lubricates the chime;
ii)- Has smooth muscles; that relax and contract to aid in peristalsis;
- Has goblet cells; that secret mucin to prevent autodigestion;
-Has lacteal; for absorption of fatty acids and glycerols.
-Vascularises; to enhance a steep concentration gradient for rapid absorption of digested materials.
sharon kalunda answered the question on May 27, 2019 at 09:44
-
The colour of tips of hair in Shepherd dog is controlled by a gene with three alleles B for Black, R for red and C...
(Solved)
The colour of tips of hair in Shepherd dog is controlled by a gene with three alleles B for Black, R for red and C for copper.
A cross between pure breeding red and copper hair tips produce offsprings with scarlet hair tips. Crossing pure breeding
red and black hair tips yields all red offsprings. A cross between pure breeds of copper and black produce offsprings that
are all copper.
a) Comment on the inheritance of the three alleles B, R and C.
b) A dog breeder wishes to know the genotype of a dog with red hair tips. State and explain the cross needed to determine
the dog’s genotype.
c) A mother of blood group AB was married to a man of blood group B heterozygous. What is the probability that one of
their sons would be blood group A? Show your working.
Date posted:
May 27, 2019
.
Answers (1)
-
Give three types of movable joints found in mammalian skeleton.
(Solved)
Give three types of movable joints found in mammalian skeleton.
Date posted:
May 27, 2019
.
Answers (1)
-
Distinguish between exocrine and endocrine glands.
(Solved)
Distinguish between exocrine and endocrine glands.
Date posted:
May 27, 2019
.
Answers (1)
-
What is the significance of the high tail power in fish locomotion.
(Solved)
What is the significance of the high tail power in fish locomotion.
Date posted:
May 27, 2019
.
Answers (1)
-
The length from tail tip to the anus in a fish is 8cm whereas that from tail tip is 24cm. Calculate the tail power of...
(Solved)
The length from tail tip to the anus in a fish is 8cm whereas that from tail tip is 24cm. Calculate the tail power of the fish.
Date posted:
May 27, 2019
.
Answers (1)
-
The diagram below represents a young root and four cells which occur in different regions of the root tip labelled K, L, M
and N.
State the...
(Solved)
The diagram below represents a young root and four cells which occur in different regions of the root tip labelled K, L, M
and N.
State the regions of the root tip where each of the cells A B C D occur.
Date posted:
May 27, 2019
.
Answers (1)
-
List two possible effects that are likely to occur if the maternal and foetal circulatory system were directly connected.
(Solved)
List two possible effects that are likely to occur if the maternal and foetal circulatory system were directly connected.
Date posted:
May 27, 2019
.
Answers (1)
-
The diagram below represents an organism.
i) Name the kingdom to which the organism belong.
ii) Give a reason for your answer in a (i) above.
(Solved)
The diagram below represents an organism.
i) Name the kingdom to which the organism belong.
ii) Give a reason for your answer in a (i) above.
Date posted:
May 27, 2019
.
Answers (1)
-
The table below shows percentage composition of blood plasma and urine from different substances.
Explain why;
i) There are no plasma proteins in the urine.
ii) Urea...
(Solved)
The table below shows percentage composition of blood plasma and urine from different substances.
Explain why;
i) There are no plasma proteins in the urine.
ii) Urea concentration is greater in the urine than in the blood plasma.
iii) There is glucose in the urine
Date posted:
May 27, 2019
.
Answers (1)
-
In an experiment to measure gaseous exchange between flying locust and its surrounding it was found that for every 1cm3 of carbon (IV) oxide,...
(Solved)
In an experiment to measure gaseous exchange between flying locust and its surrounding it was found that for every 1cm3 of carbon (IV) oxide, 1.43cm3 of oxygen was consumed.
a) Calculate the respiratory quotient forthe food substance that was being oxidised.
b) State the importance of respiratory quotient.
Date posted:
May 27, 2019
.
Answers (1)
-
Explain why it is not possible to drown a locust while holding its head under water.
(Solved)
Explain why it is not possible to drown a locust while holding its head under water.
Date posted:
May 27, 2019
.
Answers (1)
-
Differentiate between O+ and O- blood group.
(Solved)
Differentiate between O+ and O- blood group.
Date posted:
May 27, 2019
.
Answers (1)
-
The diagrams below shows two types of patterns of lignification in xylem vessels.
Name the pattern in
Figure 1 .
Figure 2 .
(Solved)
The diagrams below shows two types of patterns of lignification in xylem vessels.
Name the pattern in
Figure 1 .
Figure 2 .
Date posted:
May 27, 2019
.
Answers (1)
-
The flow diagram below represents photosynthesis process. Study it and answer the questions that follow.
Name the substances:A,B and C.
(Solved)
The flow diagram below represents photosynthesis process. Study it and answer the questions that follow.
Name the substances:A,B and C.
Date posted:
May 27, 2019
.
Answers (1)
-
The following experiment was set up to investigate the action of protease on egg white.
After 15 minutes, the contents of the beaker became clear, explain...
(Solved)
The following experiment was set up to investigate the action of protease on egg white.
After 15 minutes, the contents of the beaker became clear, explain this observation.
Date posted:
May 27, 2019
.
Answers (1)
-
State two functions of tongue during digestion in the mouth of man.
(Solved)
State two functions of tongue during digestion in the mouth of man.
Date posted:
May 27, 2019
.
Answers (1)
-
In an experiment, raw banana was peeled, mashed into a paste and was treated as shown in the set-up below.
a) Name the physiological process being...
(Solved)
In an experiment, raw banana was peeled, mashed into a paste and was treated as shown in the set-up below.
a) Name the physiological process being investigated.
b) State the expected colour of the solutions inside the visking tubing after 30 minutes.
c) Explain the observation made in (b) above.
Date posted:
May 27, 2019
.
Answers (1)
-
The photographs below are of bones obtained from the same region of a mammal body.
a) Name the region from which bones were obtained.
b) Identify the...
(Solved)
The photographs below are of bones obtained from the same region of a mammal body.
a) Name the region from which bones were obtained.
b) Identify the bones.
K
N
c) State three ways by which bone K is adapted to its function.
d) Giving a reason, name the type of joint that would be found in the animal at the proximal and distal ends of bone N.
Proximal end
Reason
Distal end
Reason
e) What is the significance of the part labelled J in the bone N?
Date posted:
May 27, 2019
.
Answers (1)
-
You are provided with photograph of specimens labelled A, B, C, D,E,F,GandH.Study them carefully then answer the questions that follow.
1. (a)Group of florets/inflorescence……………………….go to2
(b)simple flowers………………………………………..go...
(Solved)
You are provided with photograph of specimens labelled A, B, C, D,E,F,GandH.Study them carefully then answer the questions that follow.
1. (a)Group of florets/inflorescence……………………….go to2
(b)simple flowers………………………………………..go to 4
2. (a)Florets compacted into compact heads………………compositae
(b)florets not compcted but arranged in spikes…………..go to3
3. (a)Florets conspicuous /purple in colour……………….Amaranthacea.
(b)Florets inconspicuous/green in colour……………….Graminae
4. (a)Flower polysepalous/many free sepals……………..Rosacea
(b)Flower gamesepalous……………………..go to 5
5. (a)Flowers with more than five anthers……..Umbelliferae
(b)Flowers with five or less anthers…………go to 6
6. (a)Petals form a corolla tube/gamepetalous…mimmosacea
(b)petals do not form corolla tube…………..go to 7
7. (a)Flowers with large anthers………………Solanacea
(b)Flowers with small anthers………………Ranunclulacea
Use the dichotomus key provided to Identify each specimen.In each case show in sequence the steps.In the key that you followed to arrive at the identity of each specimen.
b) (i) What is the likely agent of pollination of specimen C and E?
C
E
(ii) Briefly explain an adaptive feature of specimen C to the mode of pollination you have named in b(i) above
c) Describe the ovary of specimen B and G using the most suitable biological terms.
d) Supply a term used to describe the flower of specimen E and F.
Date posted:
May 27, 2019
.
Answers (1)
-
Describe one method that can be used to measure the average growth rate of a single leaf.
(Solved)
Describe one method that can be used to measure the average growth rate of a single leaf.
Date posted:
May 27, 2019
.
Answers (1)