In genetic counseling, a man with hemoglobin formation HbA HbS is most preferred to marry a woman of?
- A. HbA HbA
- B. HbC HbH
- C. HbM HbF
- D. HbS HbS
The genes crossing over occurs during?
- A. fertilization
- B. mutation
- C. mitosis
- D. meiosis
Tall trees with buttress roots and evergreen leaves are characteristics features of?
- A. temperate grass land
- B. Southern Guinea Savanna
- C. tropical rain forests
- D. Northern Guinea savanna
The correct pathway for blood flow from the heart to the tissues of mammals is?
- A. heart-arteriole-artery-tissues
- B. heart-artery-arteriole-tissues
- C. heart-vein-venule-tissues
- D. heart-venule-vein-tissues
When a colour blind woman marries a normal man, what is the probability of their son being colour blind?
- A. 25%
- B. 100%
- C. 50%
- D. 0%
The structure that joins the two strands of a chromosome together is the?
- A. spindle
- B. cellulose
- C. centromere
- D. chromatid
Gaseous exchange in annelids is more advanced and efficient compared to flatworms because?
- A. the cells of their epidermis have no blood capillaries
- B. they have well developed respiratory structures
- C. their cylindrical shape gives high surface area to volume ratio
- D. their surface area to volume ratio is very low
The movement of sugars from the leaf to other parts of plant is?
- A. guttation
- B. transpiration
- C. transportation
- D. translocation
An example of arboreal animal is?
- A. squirrels
- B. duck
- C. pig
- D. rat
The internal structure of a leaf that has larger air space is?
- A. palisade mesophyll
- B. epidermis
- C. spongy mesophyll
- D. vascular bundles
A universal recipient of blood belongs to blood group?
- A. O
- B. AB
- C. B
- D. A
Lack of nucleus is a feature in?
- A. osteocyte
- B. neurone
- C. erythrocyte
- D. leucocyte
The development of big muscles by a wrestler is an example of?
- A. acquired characteristics
- B. inherited characteristics
- C. mutation
- D. atrophication
The components of blood in man are?
- A. red blood cells, white blood cells, plasma and water
- B. red blood cells, white blood cells, and plasma
- C. red blood cells, white blood cells, and platelets
- D. red blood cells, white blood cells, plasma and platelets
The part that performs urinogenital function in the male reproductive system is the?
- A. seminal vesacle
- B. epididymis
- C. urethra
- D. ureter
The type of fruit that is formed from a single flower having several free carpels is?
- A. indehiscent fruit
- B. aggregate fruit
- C. simple fruit
- D. fleshy fruit
The feeding relationship that exists between a tick and a cow is?
- A. parasitism
- B. mechanism
- C. saprophytism
- D. commensalism
The part of mammalian skin that excretes metabolic wastes is?
- A. sweat gland
- B. horny layer
- C. Malpighian layer
- D. sebaceous gland
Which of the following is associated with the dark stage of photosynthesis?
- A. Assimilation of Carbon(IV)oxide
- B. Photophosphorylation
- C. Photolysis
- D. Excitation of chlorophyll
In Nigeria, Southern Guinea Savanna is found in?
- A. Borno and Sokoto
- B. Kogi and Kwara
- C. Kaduna and Cross River
- D. Kano and Niger
Succession that occurs on an abandoned farm land is?
- A. tertiary
- B. secondary
- C. primary
- D. climax