Practice Pakistan's most useful MCQs for competitive exams

In sponges fertilization takes place in____________?

• (A)  Ectoderm
• (B)  Mesenchyme
• (C)  Endoderm
• (D)  Uterus

Answer

Submitted By :Ali Uppal

80% of the food of sponges consists of__________?

• (A)  Detrital organic particles
• (B)  Zooplankton and small animals
• (C)  Phytoplanktons
• (D)  all of these

Answer

Submitted By :Ali Uppal

The single main opening of the sponge cavity is____________?

• (A)  Osculum
• (B)  Ostia
• (C)  Spongocoel
• (D)  None of these

Answer

Submitted By :Ali Uppal

Sperms released in water are carried to the mesenchyme in sponges by__________?

• (A)  Amoeboid cell
• (B)  Stipules
• (C)  Spicules
• (D)  Spines

Answer

Submitted By :Ali Uppal

The skeleton of sponges is made up of___________?

• (A)  Calcium
• (B)  Silica
• (C)  Both of these
• (D)  None of these

Answer

Submitted By :Ali Uppal

The sponges in which sperms develop first are included in the category of__________?

• (A)  Peritandrous
• (B)  Pertandrous
• (C)  Protendrous
• (D)  Protandrous

Answer

Submitted By :Ali Uppal

A sponge of Antarctica which is more than a meter tall is____________?

• (A)  Scolymastra joubini
• (B)  Euplectella
• (C)  Spongilla
• (D)  Leucoselenia

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Of the following which one is not found in series proterostomia?

• (A)  Annelida
• (B)  Arthropoda
• (C)  Mollusea
• (D)  Echinodermata

Answer

Submitted By :Ali Uppal