Biology Mcqs

The skeleton of the sponges is in the form of variously shaped needle like structures called___________?

• (A)  Stripules
• (B)  Spicules
• (C)  Brails
• (D)  Spines

Answer

Submitted By :Ali Uppal

The internal buds are known as__________?

• (A)  Spicules
• (B)  Choanocytes
• (C)  Gemmules
• (D)  None of these

Answer

Submitted By :Ali Uppal

Venus flower basket is also known as___________?

• (A)  Sycon
• (B)  Euplectella
• (C)  Leucoselenia
• (D)  Spongilla

Answer

Submitted By :Ali Uppal

In acoelomates gut is ________ in origin.

• (A)  Ectodermal
• (B)  Endodermal
• (C)  Mesodermal
• (D)  None of these

Answer

Submitted By :Ali Uppal

The system well developed in the acoelomate is___________?

• (A)  Excretory system
• (B)  Nervous system
• (C)  Transport system
• (D)  All of these

Answer

Submitted By :Ali Uppal

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