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Biology Online Easy Solved MCQs Quiz Test
Q.1: In most triploblasts after embryonic development the three layers are represented as——?
- Separate layers of cells
- Structures formed from them
- Structures associated with them
- Their functions in body
B
Q.2: The function of coelom is—–?
- To increase the size of the animals
- To help in the functioning of reproductive system
- To provide space for the development of organs and systems
- None of these
C
Q.3: A sponge of Antarctica which is more than a meter tall is——?
- Scolymastra joubini
- Euplectella
- Spongilla
- Leucoselenia
A
Q.4: The sponges in which sperms develop first are included in the category of—–?
- Peritandrous
- Pertandrous
- Protendrous
- Protandrous
D
Q.5: The skeleton of sponges is made up of——?
- Calcium
- Silica
- Both of these
- None of these
C
Q.6: Sperms released in water are carried to the mesenchyme in sponges by—–?
- Amoeboid cell
- Stipules
- Spicules
- Spines
A
Q.7: The single main opening of the sponge cavity is——?
- Osculum
- Ostia
- Spongocoel
- None of these
A
Q.8: 80% of the food of sponges consists of—–?
- Detrital organic particles
- Zooplankton and small animals
- Phytoplanktons
- all of these
A
Q.9: In sponges fertilization takes place in——?
- Ectoderm
- Mesenchyme
- Endoderm
- Uterus
B
Q.10: Which of the following are motile zooids in cnidarians?
- Polyps
- Medusae
- Both of these
- None of these
A