41. Erythrocytes are known as ________
- A. white blood cell
- B. red blood cells
- C. phagocytes
- D. leucocytes
Correct Option: Answer is B
Erythrocytes contain the pigment haemoglobin, which imparts the red colour to blood, and transport oxygen and carbon dioxide to and from the tissues.
42. Gregor Mendel is regarded as the father of ______
- A. variation
- B. genetics
- C. mycology
- D. natural selection
Correct Option: Answer is B
43. The most efficient respiratory structure used by free living protozoan is ________
- A. body surface
- B. gills
- C. buccal cavity
- D. spiracle
Correct Option: Answer is A
44. Carbon (iv) oxide is added to the atmosphere when ________?
- A. plants build-up organic compounds
- B. plants absorb mineral salts
- C. sugars are completely broken down in animals
- D. there is thunderstorm
Correct Option: Answer is C
45. The host of liver fluke are ______?
- A. pig and snail
- B. pig and sheep
- C. sheep and snail
- D. pig
Correct Option: Answer is B
Fasciola hepatica(Liver Fluke) occurs in the liver of a definitive host and its lifecycle is indirect. Definitive hosts of the fluke are cattle, sheep, Pig and buffaloes. Wild ruminants and other mammals, including humans, can act as definitive hosts as well.
46.
Use the diagram to answer the question that follows
The part labelled 1 is the ________
- A. carpel
- B. sepal
- C. petal
- D. stamen
Correct Option: Answer is D
47. Which of the following factors can reduce the population of a community?
- A. Immigration
- B. edaphic
- C. predation
- D. mutualism
Correct Option: Answer is C
48. In mosses the structure which performs the function of water absorption is the _________?
- A. root hairs
- B. rhizoids
- C. capsule
- D. hyphae
Correct Option: Answer is B
Mosses do not have a proper roots, but have threadlike rhizoids that anchor them to their substrate.
Rhizoids absorb water by capillary action, in which water moves up between threads of rhizoids and not through each of them as it does in roots.
hyphae are also important in the reproductive process in that they produce new spores while root hairs are important for the uptake of nutrients
49. How does an enzyme affect the rate of a reaction?
- A. It lowers the activation energy of the reaction, increasing the reaction rate.
- B. It raises the activation energy of the reaction, decreasing the reaction rate.
- C. It lowers the activation energy of the reaction, decreasing the reaction rate.
- D. It raises the activation energy of the reaction, increasing the reaction rate.
Correct Option: Answer is A
50. Insects that goes through adult stage without becoming pupa are except ________
- A. crickets
- B. cockroach
- C. grasshopper
- D. bees
Correct Option: Answer is D
The first stage of incomplete metamorphosis is the egg. During this time, the insect will hatch into a form called a nymph.
The nymph is basically a small version of the adult insect.