In the egg of a bird, the embryo is located in the
- A. Yolk
- B. Embryo disc IV
- C. Chalaza
- D. Albumen
the inactive state exhibited by an animal during hot dry seasons is termed
- A. Aestivation
- B. Dormancy
- C. Resting
- D. Hibernation
Which of the following requires the use of carbon dating to prove that evolution has occurred?
- A. Comparative anatomy
- B. Biochemical similarities
- C. molecular records
- D. Fossil records
An example of cryptic colouration is the
- A. Mottled colours on the moths that rest in lichens
- B. bright colour of an insect pollinated flower
- C. Green colour of a plant
- D. Bright marks on poisonous tropical frog on veriegated leaves
Spines and shells on animals are adaptation for
- A. camouglage
- B. chemical defence
- C. physical defence
- D. mimicry
The presence of sunken stomata and the folding of leaves are adaptations to
- A. Prevent entry of pathogens
- B. Reduce water loss
- C. Remove excess water
- D. Prevent guttation
An argument against Lamarck’s theory of evolution is that
- A. disuse of body part cannot weaken the part
- B. disused part is dropped off in the offspring
- C. acquired traits cannot be passed on to the offspring
- D. trait cannot be acquired through constant use of body parts
An insect with a mandibulate mouth part will obtain its food by
- A. biting and chewing
- B. chewing and sucking
- C. chewing
- D. sucking
The type of reproduction that leads to variation animal and plant population is
- A. budding
- B. sexual
- C. vegetative
- D. asexual
A feature associated with the Y-chromosome in human is
- A. long eyelashes
- B. prominent fingernails
- C. facial hairs
- D. enlarged breast
An organism that has been extensively used to test the chromosomes theory of heredity is
- A. Drosophila melanogaster
- B. Muscar domestica
- C. Zea mays
- D. Homo sapiens
If the pair of alleles for baldness is given as Bb, a female carrier will be denoted by
- A. XbYB
- B. XBXB
- C. XBY
- D. XBbXb
A man and his wife are both heterozyous for the sickle-cell trait. The likely percentage of their offspring that will be either carriers or sicklers is
- A. 75%
- B. 50%
- C. 25%
- D. 100%
If a DNA strand has a base sequence TCA, its complementary strand must be
- A. ATG
- B. TAG
- C. GAT
- D. AGT
The pioneer organisms in ecological succession are usually the
- A. mosses
- B. lichens
- C. ferns
- D. algae
Soil fertility can best be conserved by the activities of
- A. Earthworm
- B. Man
- C. Rodent
- D. Microbes
A limited factor in a plant population near a chemical factory is likely to be
- A. Light
- B. Humidity
- C. wind
- D. pH
Mycorriza is an associationn between fungi and
- A. protozoans
- B. Roots of higher plants
- C. Bacteria
- D. Filamentous algae
The correct sequence of biomes from northern to southern Nigeria is
- A. Guinea savanna → sudan savanna → tropical rain forest → sahel savanna → estuarine
- B. Estuarine → tropical rain forest → guinea savanna → sahel savanna
- C. Sahel savanna → tropical rain forest → estuarine → guinea savanna
- D. Sahel savanna → sudan savanna → guinea savanna → tropical rain forest → estuarine
The most effective method of dealing with non-biodegradable pollutant is by
- A. Dumping
- B. Recycling
- C. Incineration
- D. Burying
One example of fossil fuels is
- A. Limestone
- B. Coral
- C. Coal
- D. Firewood