نماذج اسئلة Bio 341

Q1: Please state whether it is right or wrong and correct the mistake (5 marks):

1- We can find the casperian strip only in monocot stems

2- Vascular bundles are organized regularly in dicot stems while it is randomly organized in monocot stems

3- Exarch is used when there is more than one strand of primary xylem in a stem or root, and the xylem develops from the outside inwards towards the centre, this type is normally occur in dicot stems of vascular plants.

4- الفرق الرئيسي بين أوعية الخشب والقصيبات هو زوال الجدار الداخلي بين الخلايا الطولية فيظهر وعاء الخشب كأنبوب طويل قد يصل من أسفل النبات إلى أعلاه والذي يتكون من عدد من الخلايا

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5- In the root cortex there is no chloroplasts except in the piliferous layer

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Q2: Fill the blanks  (10 marks):

1- Primary xylem is the xylem that formed during primary growth from-------------------------------- and it contains the ----------------------------and the -------------------------- while the secondary xylem is formed during the secondary growth from ------------------------------------

2- The ground tissue may differentiate to cortex and ----------------------------and it mostly consists of ------------------------------- cells

قد يتميز النسيج الأساسي إلى قشرة و ---------------------------- ويتكون غالبا من خلايا -------------------

3- -------------------------- is one layer of paranchyma, may become meristematic and source of the lateral roots and cork cambium and part of the vascular cambium.

4- The survival of sieve-tube members depends on a close association with the ---------------------------------------------------

5- The phloem is a live tissue consists of --------------------tubes, ---------------------cells, phloem ------------------- and phloem --------------------.

6- The following xylem thickening types are:

------------------    ---------------------------------------     ------------------

7-There are four main patterns to the arrangement of protoxylem and metaxylem in stems and roots

1-------------------2---------------------3------------------------4---------------------

Q3: Please label the diagrams correctly and state the differences between them (5 marks)

a) This diagram is for -------------------------------------------(1 mark)

(0.25 mark for each label x 7= 3 marks) (0.5 mark for the main differences)

b) In contrast this diagram is for -------------------------------------------(1 mark)

 

Q4: Please fill the blanks