Question 1
Explain the meaning of the following branches of biology.
a) Cytology
b) Mycology
Answer
a) Study of cells
b) Study of fungi
b) Study of fungi
Question 2.
State three reasons why it’s necessary to classify living organisms
Answer
Helps to develop scientific skills like observation, recording e.t.c.
Helps to arrange information in orderly manner to avoid confusion
Helps to understand evolutionary or phylogemetic relationship
Helps to arrange information in orderly manner to avoid confusion
Helps to understand evolutionary or phylogemetic relationship
Question 3
The diagram below represents a neuron
a) i) Identify the neuron
ii) Give a reason.
b) Identify the parts labeled A and D.
c) State the function of neuron.
Answer
a) i) Sensory neuron / Afferent neuron
ii) - Cell body of the axon
- Short axon
b) A - schwann cells
D - node of
c) transmits impulse from receptors/ sense organs to central nervous system / brain/ spinal cord.
ii) - Cell body of the axon
- Short axon
b) A - schwann cells
D - node of
c) transmits impulse from receptors/ sense organs to central nervous system / brain/ spinal cord.
Question 4
A form one student trying to determine the size of onion cells observed the following on a microscopes field of view
If the student observed 2 cells across the field of view calculate the length of one cell in micrometers
Answer
Question 5
The diagram below represents a certain organism collected by a student on his way to school
a) State the class to which the organism belongs
b) Give two reasons for your answer 5(a) above
Answer
a) Arachnida
b) - Four pairs of legs
- Lack antennae
b) - Four pairs of legs
- Lack antennae