11. Which branch of biology is known for the study of tissues on artificial mediums?
[A] Pisciculture
[B] Silviculture
[C] Tissue Culture
[D] Horticulture
Show Answer
Correct Answer: C [Tissue Culture]
Notes:
Tissue culture is the growth of tissues or cells in an artificial medium isolated from the parent organism. This technique is also called micropropagation.
12. What is the basic unit of Classification?
[A] Genus
[B] Species
[C] Order
[D] Family
Show Answer
Correct Answer: B [Species]
Notes:
Species is the basic unit of classification. Species are known as the basic units of classification because individuals of species are closely related structurally and functionally and can interbreed freely.
13. Microfilaments are made up of which protein?
[A] Tubulin
[B] Actin
[C] Myosin
[D] Chitin
Show Answer
Correct Answer: B [Actin]
Notes:
Microfilaments are composed of globular subunits of the protein actin. Actin monomers polymerize in the presence of ATP to form flexible helical filaments.
14. Iodine is obtained from which of the following members?
[A] Green algae
[B] Brown algae
[C] Red algae
[D] Blue green algae
Show Answer
Correct Answer: B [Brown algae]
Notes:
Kelp such as Fucus and Laminaria are rich sources of iodine. They are members of the Phaeophyceae brown algae.
15. Which is the female reproductive organ of Bryophyta?
[A] Antheridium
[B] Oogonium
[C] Archegonium
[D] Sporangium
Show Answer
Correct Answer: C [Archegonium]
Notes:
The female sex organ is called the archegonium. It has a tubular neck and a swollen venter-shaped flask.
16. Which of the following transports the food through the leaf to the rest of the plant?
[A] Xylem
[B] Phloem
[C] Photosynthesis
[D] Guttation
Show Answer
Correct Answer: B [Phloem]
Notes:
The veins of the leaves are provided with vascular tissue called xylem and phloem. The xylem transports water from the roots to the leaves and the phloem transports food through the leaf to the rest of the plant.
17. Papaya foot rot is caused by which of the following?
[A] Phytophthora palmivora
[B] Albugo candida
[C] Peronospora parasitica
[D] Pythium aphanidermatum
Show Answer
Correct Answer: D [Pythium aphanidermatum]
Notes:
Papaya foot rot is caused by Pythium aphanidermatum. It is characterized by the presence of water-soaked patches on the stem near ground level.
18. Which of the following organisms can reproduce through regeneration?
[A] Hydra
[B] Yeast
[C] Plasmodium
[D] Planaria
Show Answer
Correct Answer: A [Hydra]
Notes:
Hydra can reproduce through regeneration and budding. The phylum Cnidaria includes Hydra. They are radially symmetrical and diploblastic.
19. How many systematic arteries are there in reptiles?
[A] 1
[B] 2
[C] 3
[D] 4
Show Answer
Correct Answer: B [2]
Notes:
There are 2 systematic arteries in reptiles. Most reptiles have three-chambered hearts with two atria and one common ventricle.
20. Double Vagina is found in which of the following?
[A] Monotremata
[B] Eutheria
[C] Marsupials
[D] All of the above
Show Answer
Correct Answer: C [Marsupials]
Notes:
Double Vagina is found in Marsupials (a type of kangaroo). They have different reproductive organs as compared to other organisms.
