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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Deficiency of K+ causes_____________?
A Stunted growth & strong chlorosis
B No electron transport chains
C Premature death of leaves
D Stunted growth of roots
Correct Answer: Premature death of leaves
Mastication is carried out by__________?
A Teeth
B Tongue
C Smooth muscles
D All of these
Correct Answer: Teeth
80% of the food of sponges consists of__________?
A Detrital organic particles
B Zooplankton and small animals
C Phytoplanktons
D all of these
Correct Answer: Detrital organic particles
The single main opening of the sponge cavity is____________?
A Osculum
B Ostia
C Spongocoel
D None of these
Correct Answer: Osculum
Sperms released in water are carried to the mesenchyme in sponges by__________?
A Amoeboid cell
B Stipules
C Spicules
D Spines
Correct Answer: Amoeboid cell
The skeleton of sponges is made up of___________?
A Calcium
B Silica
C Both of these
D None of these
Correct Answer: Both of these
The sponges in which sperms develop first are included in the category of__________?
A Peritandrous
B Pertandrous
C Protendrous
D Protandrous
Correct Answer: Protandrous
A sponge of Antarctica which is more than a meter tall is____________?
A Scolymastra joubini
B Euplectella
C Spongilla
D Leucoselenia
Correct Answer: Scolymastra joubini
The function of coelom is__________?
A To increase the size of the animals
B To help in the functioning of reproductive system
C To provide space for the development of organs and systems
D None of these
Correct Answer: To provide space for the development of organs and systems
In most triploblasts after embryonic development the three layers are represented as___________?
A Separate layers of cells
B Structures formed from them
C Structures associated with them
D Their functions in body
Correct Answer: Structures formed from them
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