Jamb Biology Past Questions and Answers

Question 511:

• JAMB 1987

The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is

A. Pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
B. Xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
C. Pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
D. Phhloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis

Question 512:

• JAMB 1987

Secondary thickening is initiated in a dicotyledonous stem by the

A. Xylem parenchyma
B. Secondary phloem
C. Endodermis
D. Cambium

Question 513:

• JAMB 1987

In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to

A. Prevent alga growth in culture solution
B. Allow root growth
C. Prevent breakdown of mineral elements
D. Prevent photosynthesis in the root

Question 514:

• JAMB 1987

The vitamin which is important in the formation of the retina pigment is

A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D

Question 515:

• JAMB 1987

Which of the following lists of organs is directly involved in nutrition?

A. Oesophagus, bronchus, stomach, pancreas and anus
B. Spleen, pharynx, duodenum, jejunum and rectum
C. Teeth, oesophagus, ileum lungs and large intestine
D. Salivary gland, liver, stomach, villi and colon