2006 - JAMB Biology Past Questions and Answers - page 2

11
The mammalian vein which starts with and ends in a capillary network is the
A
pulmonary vein
B
mesenteric vein
C
renal vein
D
hepatic potal vein
correct option: d
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12
In the transverse of a dicot sperm, the region lying between the endodermis and the vascular bundle is the
A
parenchyma
B
pericycle
C
phloem
D
hypodermis
correct option: b
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13
The two normal types of sex chromosomes are
A
XXY and XYY
B
XX and XYY
C
XY and XXY
D
XXand XY
correct option: d
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14
One advantage of variation in a species population is that individuals
A
with favoured traits become dominant
B
easily reach their reproductive age
C
are easily recognised by mates
D
are better adapted to changes
correct option: a
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15
Mendel's second law of inheritance states that
A
alleles combine randomly
B
alleles segregates independently
C
alleles seperate predictably
D
chromosomes segregates independently
correct option: b
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16
The intensity of competition among animals in a given area will increase with
A
an increase in the frequency of disease outbreaks
B
an increase in population size
C
a decrease in immigration rate
D
an increase in the emigration rate
correct option: b
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17
The part of the mammalian skin involved in temperature regulation is the
A
sweat gland
B
hair papilla
C
hair follicle
D
sebaceous gland
correct option: a
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18
The role of the Golgi complex in a eukaryotic cell is to
A
conduct irons in and out of the cells
B
transport genetic materials out of the cell
C
provide attachment for ribosomal granules
D
transport organic materials in and out of the cells
correct option: d
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19
The dominant phase in the life cycle of a bryophyte is the
A
gametangium
B
sporophyte
C
gametophyte
D
prothallus
correct option: c
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20
The evidence that supports the advancement of ferns over mosses is derive from
A
comparative anatomy
B
molecular records
C
biochemical similarities
D
physiological records
correct option: a
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