26. A curved piece of glass that could make small things look bigger is called.
(A) Mirror
(B) Sunglass
(C) Convex lens
(D) Concave lens
Answer:
(C) Convex lens
Explanation:
A convex lens converges light rays to a focal point, which magnifies objects when held close to them. It is the type of lens used in standard magnifying glasses.
27. Who is known as the Father of Microbiology.
(A) Antonie van Leeuwenhoek
(B) Louis Pasteur
(C) Robert Hooke
(D) Carl Zeiss
Answer:
(A) Antonie van Leeuwenhoek
Explanation:
Antonie van Leeuwenhoek is universally acknowledged as the Father of Microbiology for his pioneering work in creating powerful single-lens microscopes and being the first to observe and describe microorganisms.
28. Which among the following is not related with an animal cell.
(A) Cell Membrane
(B) Nucleus
(C) Mitochondria
(D) Chloroplast
Answer:
(D) Chloroplast
Explanation:
Chloroplasts are organelles that conduct photosynthesis. They are found exclusively in plant cells and algae, never in animal cells.
29. Choose the correct order of levels of organization in the body of a living organism?
(A) Tissue – DNA – Cell – Organ – Organism
(B) Cell – Tissue – Organ – Organ System – Organism
(C) Cell – Tissue – Organelles – Organ – Human Organism
(D) Atom – Molecule – Tissue – Cell – Organ
Answer:
(B) Cell – Tissue – Organ – Organ System – Organism
Explanation:
The standard biological hierarchy builds up from the basic unit of life: Cells combine to form Tissues, tissues form Organs, organs form Organ Systems, and organ systems collectively make up an Organism.
30. What among the following prevents microorganisms from infecting the pickles?
(A) Low concentration of sugar
(B) High Alkalinity
(C) High concentration of salt
(D) High concentration of water
Answer:
(C) High concentration of salt
Explanation:
In pickling, a high concentration of salt creates a hypertonic environment that draws water out of microbial cells through osmosis, dehydrating and killing bacteria that would otherwise spoil the food.
